56 years of vehicle ownership and charging multiple family vehicles, I've never removed the battery from the vehicle or disconnected the battery from the vehicle to charge it. Never seen a service garage or a roadside tow truck do it either. With modern vehicles, disconnecting the battery, without an auxiliary power source will delete the data from multiple computers in the vehicle.
Hi, thanks for watching and for sharing! From personal experience it all depends on the car but you're right as the cars get more high-tech even disconnecting the battery has become a risk 🙂
Most vehicles will maintain memories for short periods enough time to replace the battery, but not likely long enough to charge the battery by removing it from the vehicle.
@@matthewhuszarik4173 hi, thanks for watching and for sharing! Well, personally I'm a fan of taking the battery out and charging it but with modern complicated systems even that seems to be a challenge 😞
@@DespairRepair I am sixty-five and in the era before electronics in cars we routinely pulled the battery to charge them, it made it easier to monitor the water level and add water as necessary. But I haven't charged a vehicle battery in years. I just replace them every five to seven years whether they are failing or not and you don’t have to deal with it. Thankfully alternators have gotten better so they keep batteries consistently charged. The difference in how often I change batteries is the application, high performance and large engines get a new battery every give years with their higher than average draw for starting. For regular vehicles like our routine Toyotas every seven years appears to be more than frequently enough. I had an manual Corolla I allowed to go to battery failure because I could easily push start it and it went over ten years before the battery started to have problems. Of course I now live in California and my car batteries rarely face freezing temperature much less sub-zero ones. But my battery replacement guidelines I use originated when I lived in Michigan and up State New York where it gets plenty cold.
@@matthewhuszarik4173 yes, I agree with you. Taking out the battery was always the best thing to do when charging. I worked as a technician in the latter part of that era you mentioned and to be honest, it was a lot more simple and you could reuse and repair lots of parts. The batteries were meant to be maintained (you could add distilled water and acid), recharge them and they were good to go. With newer-generation batteries, you can't even access the cells to check them and try to revive it (on most types). So, as you've said, buying a new one is the best and probably the only solution. Then you have situations where you have to reset the car's computer when disconnecting the battery, start-stop systems, etc. It only gets more complicated over time which leads to making such a basic procedure like recharging the battery while in the car a matter for second questioning. By the way, nice to meet you, much respect for your comment and thank you very much for watching us. Hope it's worth your time 🙂 and some envy to you for living in California 🙂🙂. All the best!
The Answer is Yes. 9:55 And it is smart to leave one window open because some time when electronics get juice automaticly close all doors. If your key is inside at that moment you better have opening to reach it.
Have always charged in the car and my stop/start car has had no issues with it. Be Driving 45 years. One of my chargers is almost 45years old and I still use it in both of my cars.
I have CTEK chargers and i use them anytime i feel the vehicle/motorcycle needs a top up and have done this for 30 plus years,without removing battery terminals ,plus it doesn't hurt to give batteries a top up especially if there continually doing start/ stop driving or sitting around as the newer vehicles have quite a bit of draw from battery while not being used .
a 12V charger will charge it without much of an issue, because the alternator pushes 14v+ when it's running to supply the power and recharge the battery. if you are concerned you can use the 2a setting to reduce the surge. It will take longer but the idea is getting it to start and let the alternator take over.
Two days ago it was 15° below zero and I charged my battery outside and 3 hours later it started right off. Taking the battery off the car at -15° and blowing wind would have been hazardous to my health.
I have a different question about this. If i’m leaving the car for a few days on some really cold days (say a trip and i’ve parked the car in an airport lot). Can i connect the keep the car charged by using a solar panel on the dashboard, connected to a power controller then to the cigarette lighter outlet? And of course, if possible, how?
With all the computer stuff in these news vehicles, I'm afraid to charge it while it's hooked up to the car. In fact, last year I changed the battery in my 2017 Ram. Sure enough for about 3 weeks, weird stuff was happening when driving. Radio would come on when off, blower fan would go to high when on low and the remote start didn't work. It took at least 3 weeks for everything to work the bugs out. Like I said, who knows what possible damage could occur when charging in the vehicle. Nope, I'll take mine out and do it. Good video, though. Thanks for posting!
Hi, you're welcome, thanks for watching and for the kind words! You're right, if there's any risk of causing problems, it's better that way, especially with more modern cars. With today's complicated electronic systems, you never know. Added to that on some cars you have to hook up an OBD tool and do certain resets to make everything function properly (like with a start-stop system for instance). All in all, everything is becoming more complicated, even a simple thing like recharging the battery.
Just connect a battery tender to the battery. They only put out about 3 to 5 amps, and they are meant to keep the battery maintained over night or when in storage.
Hi Duke, nice to meet you, and thanks for watching! Yes that's also a very good option and I think they significantly prolong the life of the battery. Much respect for your skill, repairs, and videos 🙂
If your car has stop/start and a battery monitoring system (BMS) it's worth connecting the negative connector the otherside of the BMS sensor so the BMS knows the battery is getting charged (an earthing point is fine).
I left the charger - which is quite old with a metal case - charging the battery and turned the engine over; car didnt start, nor crank, and blew the battery fuse, i found later - which is quite hard to find and is expensive to replace, a fuse of 80 amps -- don't risk it! I think the battery isnt in good shape now either - dead flat, wont take full charge worse it destroyed the charger - i wonder if the metal case of the charger made a short, as i placed it on the engine bay. smoke was pouring from the charger even when the wires remomoved from bat.
Thank you for your video. After charging and starting the car, or van in my case, how long should I let the engine run so the battery will startthe next time?
Hi and thanks for watching! If the battery is OK, about 10 minutes should be enough. While the engine is running, if you can, turn off the lights, a/c, and other appliances, this will help recharge the battery faster.
i wish to charge my car battery while it is connected with a car charger. i got an issue: do i connect the negative plug on negative or do i have to plug it in chassis or metal bolts?
I have trickle chargers and trickle chargers that came from with the vehicle new. Never was it recommended to disconnect a cable. Disconnecting the cable actually would cause a problem that the car would have to be flat bedded to the dealer. (The battery died and it had to be flat bedded because it locked everything up) I also asked at my local GMC dealer and they do not disconnect a cable. My charger is big and heavy on wheels and I used it on Class 8 trucks.
Many modern vehicles do not have the battery in the engine compartment, and the manufacturer states to charge the battery using the earth and positive fittings under the bonnet and do not charge the battery directly. Modern automotive electronics control battery charge state, and this cannot be monitored/controlled if you hook the charger direct to the battery.
I’ve just got myself battery charger for mine as I hardly use car so it’s always going flat. I’ve always had a portable power pack though that can jump start cars they are super handy especially if you have to jump car and get somewhere but can’t restart. I will sit mine inside car then run wire out doors and into the front while mine charges thanks for the video was a little clueless
Yes! Routine. Otherwise, if you feel you must disconnect, you are possibly going toward a much more involved job plus new connectors/cables which could a more efficient charging system, but a very unhappy customer when you hand him the bill. Just charge the battery as the owner asked for, then, as you see weak spots, point them out and seek owner's approval to proceed.
Same rules apply to "jump starting" with leads. Discharged batteries may emit hydrogen gas and a spark caused by final connection via terminals can cause explosion.
Seriously? Keep a spare vehicle battery with you? I've never heard of anyone doing that. Maybe racers or something but no normal, sane person does that.
This method is fine for any vehicle, 1. Give a 12V backup supply to prevent memory erase before removing terminals. 2. Remove the battery terminals. 3. Charge the battery using charger 4. After charged, connect the battery terminals back 5. Remove the backup supply This is the correct way of charging or replacing the battery without damaging electronics.
Modern smart chargers may damage the cars electronics, like the engine management system. The reason? Smart chargers provide a higher voltage to breakdown the battery's chemistry in order to revive it. So it charges at a higher voltage than your 20 years old charger. Typical exceeding 16v so could damage or reduce the life of the cars electronics.
How about with newer cars? For some like Fords, you can program certain things. However, it's suggested to connect a battery charger to maintain voltage. Otherwise you can brick certain modules.
Hi and thanks for watching and for sharing! To be honest, regarding the latest car models, I would be careful and look at what the manufacturer recommends regarding the charger voltage and amperage. I think that a universal charger, widely used like the one in the video shouldn't do any harm. But again, best to check it out. From what I've seen, modern cars don't have good resilience to power losses and it seems best to avoid it altogether.
@@jasonashley9853 I don’t think it’s possible to ‘brick’ modules without power supply. That would be way to risky for the producer itself as well as for the dealers. Batteries get disconnected and go bad very often…
I charged a Peugeot before without disconnecting the battery and after i started it there was miss fire. Maybe it affected something in the cars computer or something. Lucky after i stopped and restarted it ran fine. I never done this again. Luckily my old Peugeot has clamps which hold the terminals on the battery and u don't need a spanner, its a great Idea and i haven't seen that before, so now i just unclip the terminals when charging but don't need to lift out the battery.
You also should not leave the battery directly on the ground/floor. It will eventually slowly discharge given enough time. A milk crate or non grounded/conductive box works great for this...
Hi there. Ive just borrowed an einhell charger for my car. (i left the key on and battery went flat) When connected to battery and plugged in the indicator was at 9V overtime it started heading towards zero. Is that the direction its meant to go?. I wasnt sure if it was meant to charge to 12V. Thankyou 🙂
hi,you recently answered question of mine on youtube stevemcgowan3017.you said check fuses power and water ingress.on wifes 308hdi 2010 diesel.mot passed then right headlight went off after heavy rain.is it ok to unplug fusebox to check for water then plug back in with out needeing recoding or anything?it runs well at moment 158000mile.my sisters 308hdi had non start problem so i suggested the battery microchip thing at front of battery and it sorted it.
Hi and thanks for watching! I didn't understand the question very well. Was there water around the fuse box and that's why you want to remove it? On most cars, if you want to do that, you have to disconnect the battery and then remove the fuse box. This is done when you have to clean the connectors for instance.
@@DespairRepair hi.yes im going to take battery out and disconnect fusebox as was told wont trigger any fault codes if just taking fusebox out 308 hdi 2010 model
My car is parked on the street outside my home, with a pavement/sidewalk in between the car and the front door. The charger I have says not to charge outside plus there's the danger of people tripping on wires and the worry of leaving my car bonnet open in public. So I'm wondering if I can take the battery out and charge it in my home near an open window? the car is from 2008 and low spec so I'm not worried about losing data and stuff. Also the charger said something about ventilation and gases. will it be dangerous to take it inside to charge? Even if I do it in a room I'm not occupying and keep it near a window?
Hi and thanks for watching! Yes, you can do that, just pay more attention to the battery while it's charging. If you sense a strong acidic smell or hear it boiling as soon as you connect the charger, best take it out and consider replacing it. Otherwise, it should be OK. This is from experience.
With a 2016 Buick verano the battery was dead and I had a jump start it when I did the jump start setting on the battery charging unit that I had plugged in It made the car go honky and make audible hum noise I quickly disconnected it, and then chose the non-jumpstart 40 amp fast charge method and just sat there for a few minutes until it started so yes the high enough voltage can mess up a lot of stuff I'm glad I was there to quickly disconnect it in less in a second
So yes even when trickle charging at 2 amps I just disconnect the negative from the battery and then connect the charger to the positive and negative of the battery and then go about it just to be safe this car is full of gadgets lots of modules would hate for it to have issues due to something I did. I already had to disable the blind spot monitoring and the lien departure stuff it had because it was taking the voltage too low and causing issues with electric steering locking up while in the middle of a turn very dangerous so yes these modules are made very cheaply and can cause serious problems especially when they suck too much energy so if it's something that you don't use just go in the options in the menu and turn it all off everything can be turned off including background backup sensors the lines, lane departure warning, accident emergency braking warnings ETC ETC Turning the stuff I don't use off stopped my car from having any issues with the power dropping too low
our mechanic said to charge a dead battery with a good charger and not rely on the alternator to bring it up to full charge because it is only a trickle charge. what do you say?
Some cars will refuse to start if the system battery voltage is even just slighly on the low side. Your power door locks not unlocking while using your remote is a good initial hint that your car is sulking.
Hi, and thanks for watching! Best use a multimeter, if you're interested we've made a video specifically on that topic. Search for alternator voltage on the channel.
Why would you do this rather than simply jump start the car and let it run for ten or fifteen minutes so the alternator can charge the battery? I understand that the battery can fail but of course then you would remove the dead battery and charge the brand new battery before putting it into the car. But I don't know why you would charge an uncharged but functioning battery instead of simply jump starting the car. I park outside in a part of Canada where it is common to get -35° or colder in January. I am currently only driving for short local trips. So I have a trickle charger under my hood attached to the battery. I plug in when I park and keep the battery topped in the extreme cold. But if I had lost all (or most) of the battery battery charge then I would simply jump start the car. What am I missing?
Hi, thanks for watching and sharing your experience. The point of the video is to provide a quick alternative to having to remove the battery, in case you don't have jump start cables available, a new battery to replace the depleted one, or else. Also, if the charger is good, it will revive the battery much faster and more effectively than the alternator. At least this is what I've experienced.
Haven’t you heard of smart chargers/intelligent chargers? With such starters it’s safe to have them continually connected to a car battery during long term storage.
I would be careful, today I connected my noco genius 5 to an agm battery as it was low (11.8v), I also connected a multimeter just to watch the voltage out of curiosity and something made the charger quickly shoot up the voltage up to 15.2v for like 3 seconds then back to 12.5v and the last light turned on as if it finished the charging process and it switched into maintenance mode or trickle mode. This all happened in less than a minute. Don't know what happened but thank god I unplugged the negative post from the battery first, just in case. Atleast the car eletronics were safe from the voltage spike.
It’s the rising cold from the concrete (cold temperatures kill batteries) have you stood on a cold concrete floor with bare feet , your feet start to seize up , well the same with a battery.
I have an old Volvo with the battery in the rear of the car….for convenience I wanted to charge the battery while in the car.I telephoned our local Volvo dealership to check this would be ok they said yes .So I proceeded and charged the battery.A short while later my instrument panel completely failed. A short period later my engine cooling fan started to play up (comes on for long periods even when engine is stone cold) an ECU problem was diagnosed.Then the cabin heater control regulator failed.Now maybe all these failures were a coincidence. But it might be that as electronics get older they get a bit more fragile to electrical surges. All I know with the cost of all my repairs I would not risk it again.The battery charger I used was a modern smart charger and of a well known make. It has been used with no problem to charge Batteries disconnected from cars.
Hi and thanks for watching! To be honest, I haven't seen that recharging the battery this way causes that kind of havoc to the cars electrics, and electronics. But you never know, it's always best to disconnect the battery and then charge or at least disconnect the minus battery terminal. It all depends on the situation, if you're in a tight spot and do not have the time or possibility, then this is certainly worth the try.
My 260a Craftsman charger on wheels will not charge a COMPLETLY DEAD BATTERY ! It's the way they work..... I spent $239,00 on it... So , I bought the same one like you got for $29.99. Charges even dead dead dead batteries. for 3 1/2 years.
If you car is Stop Start with a special battery , DO NOT take the battery out without supplying charge to the computer modules , you can probably do that through the OBD or just use a spare battery on thd leads
Sir can I used a battery charger for jump start, means while the battery charger is plugged to an outlet and both positive & the negative cables are properly placed to its corresponding battery terminals then start a car?
I think it was mentioned in almost every video: Do NOT start the car while charging the battery. It takes time and you need to allow time for the charger to do it's thing. Charging a battery is different from boosting a battery. If you meant to expedite and be faster because there's no time for waiting, then you'll have to use a booster. Again, please do NOT start the car until you first remove all electronics source of the charging unit
Hello. What charger are you using? It looks like it is a high amperage dumb charger. I guess it would be better to use a multi step Smart charger because smart chargers are safer
Exactly. Please correct me if I'm wrong, but the multi-step chargers are about $30 and do not require battery disconnection or any expertise. They even tell you when the battery is fully charged. They can even mitigate sulfur problems automatically.
What a stupid video of course you can charge your battery when it's connected no different than the alternator charging the battery when the car is running I don't know where these people come up with this kind of crap @@DespairRepair
Be careful when charging a battery inside the home. I've had my corbon monoxide detectors kick on in areas completely away from the charging area, as well as nearby
I thought it was dangerous to hook the negative clamp from the charger to the negative post of the battery?? I thought you had to hook it to the chassis of the engine or someting on the frame of the car??
A small point I feel is worth mentioning , it's not + plus and - minus , these are mathematical terms . The correct terms for batteries and dc voltage is + positive and - negative .
Hi, thanks for watching and for sharing! You're right, I used the plus and minus terms as they are frequently used when working around cars, at least here 🙂. So it sort of rubbed off 🙂
Yes you can change the battery but not recommended because you will damage the cpu 77 years of experience i downot recommended it the ford doz not like it the cpu will go out
Car mechanics always use battery maintainer while updating ECU firmware or do other programming to the PCM/ECM. So logically using one should pose no risk to the vehicle.
so i been taking batteries and putting under 300 amp loads 5 mins up to 15 mins ...5 times and bringing old batteries back to life it burns off the sulfer deposits and little shorts that drains and weaken batteries it does not work if battery has froze.just saying so a person isnt constantly putting the charger on thier car or buying a new battery when there is not a need.
Most probably system detected loss of power and reports an error. It should be safe to start the engine and drive to a garage in order to check the error and fix it.
That ever happens again just take your car to an autozone or advance auto. They will scan your car for free and tell you what caused the CEL. If they can’t diagnose it, then take it to a mechanic. No sense throwing your hard earned money away.
56 years of vehicle ownership and charging multiple family vehicles, I've never removed the battery from the vehicle or disconnected the battery from the vehicle to charge it. Never seen a service garage or a roadside tow truck do it either. With modern vehicles, disconnecting the battery, without an auxiliary power source will delete the data from multiple computers in the vehicle.
Hi, thanks for watching and for sharing! From personal experience it all depends on the car but you're right as the cars get more high-tech even disconnecting the battery has become a risk 🙂
Most vehicles will maintain memories for short periods enough time to replace the battery, but not likely long enough to charge the battery by removing it from the vehicle.
@@matthewhuszarik4173 hi, thanks for watching and for sharing!
Well, personally I'm a fan of taking the battery out and charging it but with modern complicated systems even that seems to be a challenge 😞
@@DespairRepair I am sixty-five and in the era before electronics in cars we routinely pulled the battery to charge them, it made it easier to monitor the water level and add water as necessary. But I haven't charged a vehicle battery in years. I just replace them every five to seven years whether they are failing or not and you don’t have to deal with it. Thankfully alternators have gotten better so they keep batteries consistently charged.
The difference in how often I change batteries is the application, high performance and large engines get a new battery every give years with their higher than average draw for starting. For regular vehicles like our routine Toyotas every seven years appears to be more than frequently enough. I had an manual Corolla I allowed to go to battery failure because I could easily push start it and it went over ten years before the battery started to have problems. Of course I now live in California and my car batteries rarely face freezing temperature much less sub-zero ones. But my battery replacement guidelines I use originated when I lived in Michigan and up State New York where it gets plenty cold.
@@matthewhuszarik4173 yes, I agree with you. Taking out the battery was always the best thing to do when charging.
I worked as a technician in the latter part of that era you mentioned and to be honest, it was a lot more simple and you could reuse and repair lots of parts.
The batteries were meant to be maintained (you could add distilled water and acid), recharge them and they were good to go.
With newer-generation batteries, you can't even access the cells to check them and try to revive it (on most types).
So, as you've said, buying a new one is the best and probably the only solution.
Then you have situations where you have to reset the car's computer when disconnecting the battery, start-stop systems, etc.
It only gets more complicated over time which leads to making such a basic procedure like recharging the battery while in the car a matter for second questioning.
By the way, nice to meet you, much respect for your comment and thank you very much for watching us.
Hope it's worth your time 🙂 and some envy to you for living in California 🙂🙂.
All the best!
The Answer is Yes. 9:55 And it is smart to leave one window open because some time when electronics get juice automaticly close all doors. If your key is inside at that moment you better have opening to reach it.
How you’ve made an 11 minute video out of this is beyond me. Takes 10 seconds to answer this question
It's magic 🙂. Thank you for watching!
And hoping to cut to the chase, I'm on the edge of my seat, reading your comment, hoping you wou- oh.... I guess not
@@someotherdude thanks for watching!
🤣
You have stated what I was thinking. What an utterly useless video!
Have always charged in the car and my stop/start car has had no issues with it.
Be Driving 45 years. One of my chargers is almost 45years old and I still use it in both of my cars.
Hi, thanks for watching and sharing the information!
I have CTEK chargers and i use them anytime i feel the vehicle/motorcycle needs a top up and have done this for 30 plus years,without removing battery terminals ,plus it doesn't hurt to give batteries a top up especially if there continually doing start/ stop driving or sitting around as the newer vehicles have quite a bit of draw from battery while not being used .
Thanks for watching and sharing your experience!
Thank you for this. Easy to understand and responsibly done.
You're welcome and thank you for watching!
a 12V charger will charge it without much of an issue, because the alternator pushes 14v+ when it's running to supply the power and recharge the battery. if you are concerned you can use the 2a setting to reduce the surge. It will take longer but the idea is getting it to start and let the alternator take over.
Thanks for watching and for sharing!
Kindly note that your use of "your" should be "you're" as in "you are".
@@Russell-rc6qq thanks 🙂, noted
Two days ago it was 15° below zero and I charged my battery outside and 3 hours later it started right off. Taking the battery off the car at -15° and blowing wind would have been hazardous to my health.
Excellent video! Thank you very much for a very complete explanation of the process.
You're welcome and thanks for watching!
You should make sure there is an inline fuse fitted to the live wire from charger / tender to live on battery terminal .
I have a different question about this. If i’m leaving the car for a few days on some really cold days (say a trip and i’ve parked the car in an airport lot). Can i connect the keep the car charged by using a solar panel on the dashboard, connected to a power controller then to the cigarette lighter outlet? And of course, if possible, how?
With all the computer stuff in these news vehicles, I'm afraid to charge it while it's hooked up to the car. In fact, last year I changed the battery in my 2017 Ram. Sure enough for about 3 weeks, weird stuff was happening when driving. Radio would come on when off, blower fan would go to high when on low and the remote start didn't work. It took at least 3 weeks for everything to work the bugs out. Like I said, who knows what possible damage could occur when charging in the vehicle. Nope, I'll take mine out and do it. Good video, though. Thanks for posting!
Hi, you're welcome, thanks for watching and for the kind words!
You're right, if there's any risk of causing problems, it's better that way, especially with more modern cars.
With today's complicated electronic systems, you never know.
Added to that on some cars you have to hook up an OBD tool and do certain resets to make everything function properly (like with a start-stop system for instance).
All in all, everything is becoming more complicated, even a simple thing like recharging the battery.
More issues occur if you do actually remove the battery, unless you use a memory keeper as I do, it works well then
Thank you very much!! I was always afraid of getting shocked with the cables until watching this. 😊
You're welcome and thanks for watching!
Thank you for this wonderful video explaining so clearly and fully. I needed this.
You're welcome and thanks for watching!
Just connect a battery tender to the battery. They only put out about 3 to 5 amps, and they are meant to keep the battery maintained over night or when in storage.
Hi Duke, nice to meet you, and thanks for watching!
Yes that's also a very good option and I think they significantly prolong the life of the battery.
Much respect for your skill, repairs, and videos 🙂
If your car has stop/start and a battery monitoring system (BMS) it's worth connecting the negative connector the otherside of the BMS sensor so the BMS knows the battery is getting charged (an earthing point is fine).
Thanks for watching and for sharing this valuable information!
I have charged my car battery several times without disconnecting it and never had a problem.
Hi and thanks for watching! Same here, just don't how the latest car models react to this since they're packed with various electronic systems.
Yeah but have you started the engine while u did. Or left it overnight and forgot to remove the charger and started the engine
I left the charger - which is quite old with a metal case - charging the battery and turned the engine over; car didnt start, nor crank, and blew the battery fuse, i found later - which is quite hard to find and is expensive to replace, a fuse of 80 amps -- don't risk it! I think the battery isnt in good shape now either - dead flat, wont take full charge
worse it destroyed the charger - i wonder if the metal case of the charger made a short, as i placed it on the engine bay. smoke was pouring from the charger even when the wires remomoved from bat.
Dont you love those cars where you have to take the tire off to change the battery? Lol
Must be a Chrysler.
Thank you for your video. After charging and starting the car, or van in my case, how long should I let the engine run so the battery will startthe next time?
Hi and thanks for watching!
If the battery is OK, about 10 minutes should be enough.
While the engine is running, if you can, turn off the lights, a/c, and other appliances, this will help recharge the battery faster.
i wish to charge my car battery while it is connected with a car charger. i got an issue: do i connect the negative plug on negative or do i have to plug it in chassis or metal bolts?
Hi, thanks for watching and sorry for the late reply.
Connect directly to the battery if possible, that's the best way.
I have trickle chargers and trickle chargers that came from with the vehicle new. Never was it recommended to disconnect a cable. Disconnecting the cable actually would cause a problem that the car would have to be flat bedded to the dealer. (The battery died and it had to be flat bedded because it locked everything up) I also asked at my local GMC dealer and they do not disconnect a cable. My charger is big and heavy on wheels and I used it on Class 8 trucks.
Thanks for watching and for sharing!
i just purchased a charger similar to yours, how do you know the battery is full?
Many modern vehicles do not have the battery in the engine compartment, and the manufacturer states to charge the battery using the earth and positive fittings under the bonnet and do not charge the battery directly. Modern automotive electronics control battery charge state, and this cannot be monitored/controlled if you hook the charger direct to the battery.
Thank you, for NOT having, useless noise : ie) 'music ' . GOOD FOR US....
You're welcome and thanks for watching 🙂
So disconnect both terminals and charge in situ.? Takes longer to take off and then replace the battery clamp than anything else.
Thanks for watching and for sharing!
I’ve just got myself battery charger for mine as I hardly use car so it’s always going flat. I’ve always had a portable power pack though that can jump start cars they are super handy especially if you have to jump car and get somewhere but can’t restart. I will sit mine inside car then run wire out doors and into the front while mine charges thanks for the video was a little clueless
Get a Battery Tender not a charger. This charger will never over charge your battery.
Yes! Routine. Otherwise, if you feel you must disconnect, you are possibly going toward a much more involved job plus new connectors/cables which could a more efficient charging system, but a very unhappy customer when you hand him the bill. Just charge the battery as the owner asked for, then, as you see weak spots, point them out and seek owner's approval to proceed.
Thanks for watching and for sharing!
Why does my battery charger say to use a chassis ground for the negative and positive to positive terminal when charging with the battery installed?
Same rules apply to "jump starting" with leads. Discharged batteries may emit hydrogen gas and a spark caused by final connection via terminals can cause explosion.
Always keep a spare battery with 800cc and up and a battery charger you can get from Autozone or Advanced Auto Parts even Wal-Mart and some cables
Thanks for watching and for sharing!
Seriously? Keep a spare vehicle battery with you? I've never heard of anyone doing that. Maybe racers or something but no normal, sane person does that.
I often recharge my car battery due to very short Winter journey,s,I just slow charge on th car and still connected,my car is a 07Ford Fiesta.
Thanks for watching!
This method is fine for any vehicle,
1. Give a 12V backup supply to prevent memory erase before removing terminals.
2. Remove the battery terminals.
3. Charge the battery using charger
4. After charged, connect the battery terminals back
5. Remove the backup supply
This is the correct way of charging or replacing the battery without damaging electronics.
Thanks for sharing and watching!
Modern smart chargers may damage the cars electronics, like the engine management system. The reason? Smart chargers provide a higher voltage to breakdown the battery's chemistry in order to revive it. So it charges at a higher voltage than your 20 years old charger. Typical exceeding 16v so could damage or reduce the life of the cars electronics.
How about with newer cars? For some like Fords, you can program certain things. However, it's suggested to connect a battery charger to maintain voltage. Otherwise you can brick certain modules.
Hi and thanks for watching and for sharing!
To be honest, regarding the latest car models, I would be careful and look at what the manufacturer recommends regarding the charger voltage and amperage.
I think that a universal charger, widely used like the one in the video shouldn't do any harm.
But again, best to check it out.
From what I've seen, modern cars don't have good resilience to power losses and it seems best to avoid it altogether.
@@DespairRepair may depend on the charger too. I bougt a Noco Genius 10 smart charger myself. Seems to have a lot of safety features.
@@jasonashley9853 I don’t think it’s possible to ‘brick’ modules without power supply. That would be way to risky for the producer itself as well as for the dealers. Batteries get disconnected and go bad very often…
I charged a Peugeot before without disconnecting the battery and after i started it there was miss fire. Maybe it affected something in the cars computer or something. Lucky after i stopped and restarted it ran fine. I never done this again. Luckily my old Peugeot has clamps which hold the terminals on the battery and u don't need a spanner, its a great Idea and i haven't seen that before, so now i just unclip the terminals when charging but don't need to lift out the battery.
Thanks ! Very informative and concise !
Hi, thank you for watching and for the kind words 🙂
Concise it is not! he could have just said yes or no! 5 second job!
Good video , but with battery management and stop start systems with AGM battery always take battery out and use smart charger, regards
Thank you for watching and for sharing!
You also should not leave the battery directly on the ground/floor. It will eventually slowly discharge given enough time. A milk crate or non grounded/conductive box works great for this...
Hi there. Ive just borrowed an einhell charger for my car. (i left the key on and battery went flat) When connected to battery and plugged in the indicator was at 9V overtime it started heading towards zero. Is that the direction its meant to go?. I wasnt sure if it was meant to charge to 12V. Thankyou 🙂
Hi and thanks for watching! I think that's OK but just in case check the battery voltage when it's charged.
Showing what the meter on the charger would look like when fully charged would have been nice.
Anyone who can read would know !!
read what?@@gordonduke7174
hi,you recently answered question of mine on youtube stevemcgowan3017.you said check fuses power and water ingress.on wifes 308hdi 2010 diesel.mot passed then right headlight went off after heavy rain.is it ok to unplug fusebox to check for water then plug back in with out needeing recoding or anything?it runs well at moment 158000mile.my sisters 308hdi had non start problem so i suggested the battery microchip thing at front of battery and it sorted it.
Hi and thanks for watching! I didn't understand the question very well.
Was there water around the fuse box and that's why you want to remove it?
On most cars, if you want to do that, you have to disconnect the battery and then remove the fuse box. This is done when you have to clean the connectors for instance.
@@DespairRepair hi.yes im going to take battery out and disconnect fusebox as was told wont trigger any fault codes if just taking fusebox out 308 hdi 2010 model
My car is parked on the street outside my home, with a pavement/sidewalk in between the car and the front door. The charger I have says not to charge outside plus there's the danger of people tripping on wires and the worry of leaving my car bonnet open in public. So I'm wondering if I can take the battery out and charge it in my home near an open window? the car is from 2008 and low spec so I'm not worried about losing data and stuff. Also the charger said something about ventilation and gases. will it be dangerous to take it inside to charge? Even if I do it in a room I'm not occupying and keep it near a window?
Hi and thanks for watching! Yes, you can do that, just pay more attention to the battery while it's charging.
If you sense a strong acidic smell or hear it boiling as soon as you connect the charger, best take it out and consider replacing it.
Otherwise, it should be OK. This is from experience.
Of coarse you can charge your battery on the vehicle, what does your dynamo or alternator do!
Thanks for watching!
With a 2016 Buick verano the battery was dead and I had a jump start it when I did the jump start setting on the battery charging unit that I had plugged in It made the car go honky and make audible hum noise I quickly disconnected it, and then chose the non-jumpstart 40 amp fast charge method and just sat there for a few minutes until it started so yes the high enough voltage can mess up a lot of stuff I'm glad I was there to quickly disconnect it in less in a second
So yes even when trickle charging at 2 amps I just disconnect the negative from the battery and then connect the charger to the positive and negative of the battery and then go about it just to be safe this car is full of gadgets lots of modules would hate for it to have issues due to something I did.
I already had to disable the blind spot monitoring and the lien departure stuff it had because it was taking the voltage too low and causing issues with electric steering locking up while in the middle of a turn very dangerous so yes these modules are made very cheaply and can cause serious problems especially when they suck too much energy so if it's something that you don't use just go in the options in the menu and turn it all off everything can be turned off including background backup sensors the lines, lane departure warning, accident emergency braking warnings ETC ETC
Turning the stuff I don't use off stopped my car from having any issues with the power dropping too low
Thank U! It's been a while since I've done this!
You're welcome and glad if the video helped!
our mechanic said to charge a dead battery with a good charger and not rely on the alternator to bring it up to full charge because it is only a trickle charge. what do you say?
Hi and thanks for watching! I think the mechanic is right.
This man knows how to explain.
Thanks for watching and for the kind words 🙂
Lol no.
Some cars will refuse to start if the system battery voltage is even just slighly on the low side. Your power door locks not unlocking while using your remote is a good initial hint that your car is sulking.
So does this mean I can charge it without connecting the battery terminal? I can’t find a straight answer
This guy is like Tony Blair wont answer the question directly!
@@binagarten4667 I’m American but I guess that goes for any politician 😅😂
10-Amp automatic battery chargers do not require any disconnection of battery from car and only cost about $30.
Thanks for watching and for sharing!
How do I check the alternator volts
Hi, and thanks for watching! Best use a multimeter, if you're interested we've made a video specifically on that topic.
Search for alternator voltage on the channel.
I approve this video 👍🏻
Thanks for watching!
surely you can as long as the charger voltage is below 14V or better 13.8V, there is no need to disconnect the battery at all.
Why would you do this rather than simply jump start the car and let it run for ten or fifteen minutes so the alternator can charge the battery?
I understand that the battery can fail but of course then you would remove the dead battery and charge the brand new battery before putting it into the car. But I don't know why you would charge an uncharged but functioning battery instead of simply jump starting the car.
I park outside in a part of Canada where it is common to get -35° or colder in January. I am currently only driving for short local trips. So I have a trickle charger under my hood attached to the battery. I plug in when I park and keep the battery topped in the extreme cold. But if I had lost all (or most) of the battery battery charge then I would simply jump start the car.
What am I missing?
Hi, thanks for watching and sharing your experience.
The point of the video is to provide a quick alternative to having to remove the battery, in case you don't have jump start cables available, a new battery to replace the depleted one, or else.
Also, if the charger is good, it will revive the battery much faster and more effectively than the alternator.
At least this is what I've experienced.
Haven’t you heard of smart chargers/intelligent chargers? With such starters it’s safe to have them continually connected to a car battery during long term storage.
I would be careful, today I connected my noco genius 5 to an agm battery as it was low (11.8v), I also connected a multimeter just to watch the voltage out of curiosity and something made the charger quickly shoot up the voltage up to 15.2v for like 3 seconds then back to 12.5v and the last light turned on as if it finished the charging process and it switched into maintenance mode or trickle mode. This all happened in less than a minute.
Don't know what happened but thank god I unplugged the negative post from the battery first, just in case. Atleast the car eletronics were safe from the voltage spike.
I always thought leaving a battery on concrete drains the battery over time such as improper storage.
i always heard that too.
It’s the rising cold from the concrete (cold temperatures kill batteries) have you stood on a cold concrete floor with bare feet , your feet start to seize up , well the same with a battery.
that sounds right.@@gregreed402
I have an old Volvo with the battery in the rear of the car….for convenience I wanted to charge the battery while in the car.I telephoned our local Volvo dealership to check this would be ok they said yes .So I proceeded and charged the battery.A short while later my instrument panel completely failed. A short period later my engine cooling fan started to play up (comes on for long periods even when engine is stone cold) an ECU problem was diagnosed.Then the cabin heater control regulator failed.Now maybe all these failures were a coincidence. But it might be that as electronics get older they get a bit more fragile to electrical surges. All I know with the cost of all my repairs I would not risk it again.The battery charger I used was a modern smart charger and of a well known make. It has been used with no problem to charge Batteries disconnected from cars.
Hi and thanks for watching! To be honest, I haven't seen that recharging the battery this way causes that kind of havoc to the cars electrics, and electronics.
But you never know, it's always best to disconnect the battery and then charge or at least disconnect the minus battery terminal.
It all depends on the situation, if you're in a tight spot and do not have the time or possibility, then this is certainly worth the try.
My 260a Craftsman charger on wheels will not charge a COMPLETLY DEAD BATTERY ! It's the way they work..... I spent $239,00 on it... So , I bought the same one like you got for $29.99. Charges even dead dead dead batteries. for 3 1/2 years.
i did this and my car started but the next day the battery was dead again. what does this mean
If you car is Stop Start with a special battery , DO NOT take the battery out without supplying charge to the computer modules , you can probably do that through the OBD or just use a spare battery on thd leads
Thanks for watching and for sharing!
With a Chrysler you cannot take the battery out so the only option isvto charge it while it is connected to the vehicle
Thank you
Sir can I used a battery charger for jump start, means while the battery charger is plugged to an outlet and both positive & the negative cables are properly placed to its corresponding battery terminals then start a car?
I think it was mentioned in almost every video: Do NOT start the car while charging the battery. It takes time and you need to allow time for the charger to do it's thing. Charging a battery is different from boosting a battery. If you meant to expedite and be faster because there's no time for waiting, then you'll have to use a booster. Again, please do NOT start the car until you first remove all electronics source of the charging unit
Eleven minutes to answer a simple question that can be answered simply in a couple of seconds. 😮
Svaka cast kralju
Hvala na komentaru i nadam se da je video pomogao 🙂
diesel engine but it has 60% battery life (but it is discharged). When try to jump start it to another car it took only a minute to start my suv
Thanks - helpful!!
You're welcome and thanks for watching!
Thank you sir ❤
You're welcome and thanks for watching!
Hello. What charger are you using? It looks like it is a high amperage dumb charger. I guess it would be better to use a multi step Smart charger because smart chargers are safer
Exactly. Please correct me if I'm wrong, but the multi-step chargers are about $30 and do not require battery disconnection or any expertise. They even tell you when the battery is fully charged. They can even mitigate sulfur problems automatically.
YES ,of course you can. done it many times. WHY should it cause problems.
Thanks for watching and for sharing!
Excellent . well explained . Thank you .
You're welcome, thanks for watching and for the kind words 🙂
Don't connect the black/ground to the battery when using a charger. Connect to vehicle engine/metal.
Yes is the answer.There it only took a couple of seconds.
Thanks for watching!
What a stupid video of course you can charge your battery when it's connected no different than the alternator charging the battery when the car is running I don't know where these people come up with this kind of crap @@DespairRepair
Be careful when charging a battery inside the home. I've had my corbon monoxide detectors kick on in areas completely away from the charging area, as well as nearby
I thought it was dangerous to hook the negative clamp from the charger to the negative post of the battery?? I thought you had to hook it to the chassis of the engine or someting on the frame of the car??
Hi, and thanks for watching! Nope, at least from what I've seen and done, the correct way is to connect the charger to the battery terminals.
Question: Can You Charge The Battery While It's Connected To The Car?
Answer: Yes.
A small point I feel is worth mentioning , it's not + plus and - minus , these are mathematical terms . The correct terms for batteries and dc voltage is + positive and - negative .
Hi, thanks for watching and for sharing! You're right, I used the plus and minus terms as they are frequently used when working around cars, at least here 🙂. So it sort of rubbed off 🙂
@@DespairRepair No problem , I enjoyed the video , have a great Christmas and New Year 🙂
@@Gordon_L🙂. Thank you very much and Merry Christmas and a Happy New Year to you too and all the best 🙂
Of course you can...the alternator charges while connected!
GOOOD-video! Lots-of 'little' tips to assist the UN-educated. Subbd!
I have no lights at sll
Listen up people you dont have to remove battery out of the car. just take negative lead off and charge.
When charging my battery the charger never goes to zero and battery is disconnected from car..wonder wtf that means
Get a Battery Tender it will shut down, and restart when the voltage drops. They work great.
but I want to run car audio for days. Can I do it with these old dumb chargers?
No. They are to crude for todays electronics. Get a Battery Tender.
@@tomking1890 I already got one and it was cheap. 10 amp Parkside charger has this function
I watched 10 seconds... yes you can
Yes you can change the battery but not recommended because you will damage the cpu 77 years of experience i downot recommended it the ford doz not like it the cpu will go out
Car mechanics always use battery maintainer while updating ECU firmware or do other programming to the PCM/ECM. So logically using one should pose no risk to the vehicle.
i i eat the battery charger does it charge me
That’s not how you do it! The negative clamp still goes to an unpainted metal in the vehicle.
Thanks for watching, it goes on the battery clamp, much safer
Can you get to the point already
Make your own video then 👌
NOT a good idea. Can't be good for an alternator to run power backwards through it.....why chance it ?
YES, charge it in the car
Thanks for watching!
A simple yes or no would have done lol
Short answer - yes you can. How do you think trickle chargers/booster packs/jump leads work. SMH
Thanks for watching and for sharing!
Thanks for watching and for sharing!
Never charge batteries the ground, charge in car just and disconnect neg cable.
so i been taking batteries and putting under 300 amp loads 5 mins up to 15 mins ...5 times and bringing old batteries back to life it burns off the sulfer deposits and little shorts that drains and weaken batteries it does not work if battery has froze.just saying so a person isnt constantly putting the charger on thier car or buying a new battery when there is not a need.
Thanks for watching. You're right and thanks for sharing
I did this yesterday and now my engine light is on. Anyone who could know why my engine light is on?
Most probably system detected loss of power and reports an error. It should be safe to start the engine and drive to a garage in order to check the error and fix it.
That ever happens again just take your car to an autozone or advance auto. They will scan your car for free and tell you what caused the CEL. If they can’t diagnose it, then take it to a mechanic. No sense throwing your hard earned money away.
This is definitely not an information dense video. Even watching at 2x speed I was dozing off in the middle.
Not aplicabile for cars of 5years of age or less!
Nothing new here.
Thanks for watching!
This guy is milking it for petes sake this could have been answered in 5 seconds.
Thanks for watching!