LiPo Battery C Rating Explained
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- เผยแพร่เมื่อ 29 มิ.ย. 2018
- Over the last year, I have had numerous questions on if a higher C rating on a battery will affect or damage an ESC or a Motor. I thought I would create a video explaining what C rating is and that it will not hurt anything by having too much (if there is such a thing). But having too little C rating will damage the battery. Hopefully this clears some things up for some of the newcomers to the hobby and helps them decide on a better battery for their setup. I would love to hear your feedback on this in the comments below!
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No wonder my battery is puffy, and I've been in the hobby for 3 years, thanks for the awsome video
I'm glad I could help out 👍
I've watched ton of videos on youtube....but yours is the cleanest explanation so far...thank you !!!
Best explanation. Thanks for the rundown for dummies👍
Thanks so much for this.. got back into hobby few months ago still learning did not want to hurt my arrma outcast !
finally got an answer to my puffy batteries - great vid
thank you for this ! been kinda worried when looking for batteries so this helped !!
Best explanation by far
💥 BOOM LOVED IT ! Simple and to the point thanks
Glad I could help out Carlos. www.Rc-Help.com
Thanks that’s the answer to my issues, as my motor was cutting out, and I thought it was because I ran a 75c through a 30A esc
Well said. Completely understand now.2 thumbs up.
Happy I could help out Buddy!
Great video, to the point. Thanks bro!
Great explanation!
wow, this is the best info i have gotten on the C-Rating... i'm getting a higher C-rating...been trying to find the right combo .. i already have a 30C ESC and a 1534Kv 2-3s Li-Po electric motor for a foam training plane with a 48" wingspan (i know that's a lot smaller than a lot of Horizon Hobby trainers but it's hard to scratch-build a 51" or 58" wingspan guys, IMO). thanks for the great, great video. I will click your link for the combo suggestions.
There is no such thing as a "30C ESC". I'm guessing you means 30 amps?
Glad I could help out with some information.
Thanks for the info, you've explained it pretty well. I've been considering getting back into rc trucks, but electric this time instead of nitro and I hop in seeing lipo this lipo that, when I was in the hobby last nimh was the thing to use and lipo was for the rich folk with nothing better to do lol. So I never learned about it. I know a bit about li-ion batteries but not lipo and this c rating I kept seeing with the brushless setups along with conflicting info saying I need this much but not that much blah blah. I think I know what I need to look for now for the motor set up I plan on running now that most of my confusion is gone.Thanks 😊
Tony, Thanks this is Good info, I need to get back over to the forum..Its been a while.. James
Hey James, it has been a while. Hope to see you over there soon. Thanks for posting on the video!
Thanks, very informative. This helps out a lot! 👍
Glad it was helpful!
Thanks for the info, subscribed to your channel !!
Thanks for the sub! www.Rc-Help.com
This came in handy while researching batteries for Airsoft. Thank you.
My pleasure!
The lack of progress and knowhow is in the AEG hobby is amazing. People raving about Deans connectors and brushed motors...it's a hoot for anyone coming from the FPV hobby. You guys could do so much better...
Thank you , it was very clarifying.
My pleasure Calo. www.Rc-Help.com
Perfect info.
thanks tony this helped allot keep it up
My pleasure bro! Hope to see you tomorrow as long as the weather holds.
Thank you, i now understand!!!
Great help👍
Wonderful , thank you!
My pleasure. www.Rc-Help.com
Thank you ! Very helpful.
Glad it was helpful!
I love your explanation, so spot on! Good job! Just one question, does higher C rating means it discharge the battery faster with a lower C rating?
Obviously he never explained the "C" Rating so how is it a good job ?
Thanks
Thank you so much love you man
Best explanation 🍺
Thanks 🙂
Ok thanks. At least I get the basic idea and not confusion.
Thank u so much for sharing 👍👍👍👍🙂
My pleasure 😊 www.Rc-Help.com
Really helpful video.i have a question too.the esc i'm going to buy is 60a and it says maximum 3A.How to calculate the power to buy a lipo with correct power?
The 60a rating is going to be your motor rating, the 3a is going to be your BEC rating or how much power your servos can pull. As for matching a battery to everything, check out this video th-cam.com/video/LlSa2f76QiU/w-d-xo.html
Thanks for taking time and sharing all these helpfull tips, this is the best educational video. Tons of videos up in here, most of them are conplete BS and collecting view counts with headlines.
But I still have one more question, how can person choose proper C rating battery for a given DC motor ? Thanks
You will need to know what kind of power the motor is pulling. Check out my other video, Matching Motor Battery & ESC --> th-cam.com/video/LlSa2f76QiU/w-d-xo.html
Great video. You explained it well! But I still have a question(what else is new). How does one determine c rating? It it determined by how thick the connections are between the cells? Or is it how thick the lithium metal inside is?
C rating is determined by the manufacturer with much more complicated electronics than I have access to. It has to do with the internal resistance of the cells and how well they do with high current loads. They usually set this figure conservatively and have what is known as a "burst rate" which can be done for no more than 10 seconds. You see this on packs where it says 35/65C and such. But as a consumer, we don't have a way to determine the C rating other than running it at a known amperage and seeing if the pack heats up. I don't have to tell you that this is quite dangerous. Too many amps equals bad things happening to a LiPo.
@@RcHelpDotCom Alright thanks. That's helpful. I feel like it kinda had something to do with how thick the lithium metal inside is. Because it's basically lithium metal folded back and forth a lot of times. Say for example a 4000 mah 25c lipo and a 4000 man 50c lipo take up the same volume, but the lithium metal in the 50c battery is twice as thick than the 25c. Thicker metal = higher current. But as a result of it being thicker, it's more brittle and is much more difficult to fold. I only think I know what I'm talking about. I know it's not that simple but, that would make the most sense to me. What do you think?.
In a way, it does have something to do with the thickness. But, the MAH makes more of a difference on the thickness of each cell. More MAH, more thick (bad grammar, I know lol). But I could see how a thicker cell with the same MAH (as you stated) could have a higher C rating. This would bring us back to the IR, and doing it that way may be the manufacturers way of getting around a slightly higher IR so that you can still pull a higher current.
Just an aside, I love comments like this. Gets me to thinkin' lol. Thank you.
@@RcHelpDotCom No problem! But what I actually meant by thickness was not the thickness of the cell itself, but the thickness of the lithium metal inside each cell. Like, the inside of a lipo is basically a long but thin sheet of lithium metal I think. And that sheet is folded over many times and I believe theres an insulin that separates each fold.
So lets say, for example, you have two batteries. Both batteries and the same physical size. Wont say the mah of them, but let's say you have a 25c battery. Inside, the lithium metal is folded 50 times.
Now the other one is a 50c battery but inside of this battery, the lithium metal is only folded over 25 times. You see where I'm going with this? The litium metal in the 50c battery is twice as thick so it was folded half as many times while still being the same amount of lithium metal as the 25c. As you know, the thicker a wire is, the more current you can safely flow through it without it heating up. Maybe the same goes for lithium metal. 🤷🏻♂️
Hey I love ur videos! I have a 2300kv motor and a 40 amp ESC. The battery I wish to purchase is 1000mAH and has a C rating of 20. The voltage is 11.4V. I have calculated the continuous discharge is 20A. Will this work with the 40 amp ESC?
From the number you have provided, I will have to take your word on the 20 amps for the motor. kv does not tell me anything about the motor other than how many rpm the motor will spin with a given voltage. But, at 20 amps, yes, the 40 amp speed control will be just fine.
I will need a battery pack that can take a continuous draw of 20.83 amps. I need to know if each battery in the pack has to meet that rate or if that rate is increased by wiring in series.
I've been using 75c lipos for my 3 and 4 inch quads. I accidentally bought two 850mah 45c batteries. I assume the 45c batteries are good for cruising but not for freestyle flying where I have a lot of full throttle blips?
Are you sure? Because I got a battery GNB HV 120/240 C and seems like it damaged my ESC (speedybee F405 55A). One of the 4 ESCs of the 4 in 1 ESC sometimes work and sometimes don't after I used this battery. I saw a video from JB saying the opposite. Thanks in advance for your return.
NICEEE
Is higher c rating heavier or anything negative about going over board?
I have a castle creations Mamba Monster motor and esc in my RC8 with a Venum 4S 5300 70C battery that performed great. It recently died. I bought a Zeee 4S 6300 80C. Is this suitable or should I go higher on the C rating ?
Does putting them in series doubles the C rating? Or does the C rating stays the same. Say two 2s lipo with 50c makes a 4s 100c when connected in series?
Done subcribe bro.. bro, i have question.. quad fpv can use the 20C rate??
Sir one cell samsung original i take nd c rate is 2A then our fast charger is 9V 2A so how its use nd plzz explain how it work adapator nd battery
When using a dual connector for such as the arrma kraton, needing to batteries instead of one to the esc, can the discharge rate or c rate be different between both batteries/packs?
They can, but be very careful. When running parallel, it's the voltage (S rating) that really matters.
So my stock car came with 25c rating if I use a 30c rating it could in crease my performance, if it can handle more? Than 25 c?
Thanks. Does this mean lower c rating gives longer flight time! I am confused because I got 4S 120c packs which give me less flight time thinking of dumping the batteries, so why higher Cs are more expensive ? ! I just ordered 100c. Should I order 20c better! I am flying a T28 FMS Trojan 1400mm aircraft. Is this also applicable in rc cars ?! Looking for high speed and longer flight time. Thanks
What's the meaning of to charge at 1c to 3c please explain in simple terms thanks.
What if i need tham in serial and thay have not the same c rating like one is 50 c and second is 80 c it is for small quad but here shouldn't be diference with plane or car
I just bought a 2s lipo with 100c. I shouldn’t have to worry about it puffing up now right?
Tony I got a question for you I want to run a dual two 3s 5000mah lipos instead of a single 5000 pack for scale 600 size helicopter the weight is about the same, with two lipos I can put the on each side and slide them for CG adjustment?
As long as they are secure and your CoG is adjusted correctly, I don't see why not. www.Rc-Help.com
Can we calculate the c rating of a lithium Ion battery?
I have one battery of mini RC Heli of 1S 3.7v And 300mAh and I bought new battery 3.7v And 500mAh thinking it will give me more fly Time but it just wont work. It stops immediately I think it has something to do with these C rating. Can I change C rating by manipulating circuit on battery?
Saw a video on taking the c rating and times it by the mah gets you the amps mine was 15c x 1.5mah = 22.5amps my battery is 1500mah \ 15c .... Not enough play time trying to figure out if it my esc/motor will be ok if i buy a 4000mah \ 30c battery?
You can get as large of a mah and C as you can afford and as the model can carry. Voltage is what matters here. The motor pulls the power, the ESC regulates the power, the battery is just a storage container. C is how fast you can pull that power from the battery. www.Rc-Help.com
Question, I have an EDF 5075 kv650 with a hobbywing 160A ESC. It’s rated for 50volts. I used 4x 11.1 3500mah 60C Lipo Batteries in series. And they heat up fast, 1 of them even puffed up. I won’t be able to fly the jet in that state. Will this problem be solved if I go for a bigger C-rating?
Those batteries should be good to 210 amps if they are true 60c packs. The motor, if the one I found is the one that you have (kv means nothing when talking about current, I need wattage or amperage numbers, kv is only rpm per volt), only pulls 140 amps so you are well under the max capacity of the batteries. My guess is that you have not enough air flow over the packs (maybe) or the IR of the packs (internal resistance) is high causing a lot of heat. This is a real issue in cheaper packs. www.Rc-Help.com
I have a question, I am looking to buy new lipos for my brushed 1/16 e revo. Is there any difference or drawbacks to going with 35C from my previous 25C? Exact same battery. Also, i am buying new ones because the old ones are bloated, but i think thats just because i improperly stored them for a long time.
There are never any drawbacks to going with a higher C, only advantages. In no way will you hurt anything (other than your wallet) by going with the highest C rating you can afford. And when you store the packs, store them at 3.7 to 3.8 volts per cell. Basically the nominal voltage of the pack. So for a 3s, that would be 11.1. Hope this helps. www.Rc-Help.com
so my rc car has a warning saying that it can only run batteries less than or equal to 25c, why is that warning there, can i run a higher C rating battery even though the car warns me against it?
Hi I’m in the beginning process of building an electric surfboard but I don’t want an ESC unless I really need it , can I run my battery straight to an ON OFF switch ? Cheers 🍺
If you have a brushed motor, then yes. If you are using a brushless motor, then no.
The stock batt in my heli is 300mAh 30C and it always comes down hot, about 120F. I tried a 350mAh 50C. Same thing. You want to take a guess what the problem might be?
That is about 48ºc which is on the warm side, but for a very small battery like this is about normal. However, the 50c should have come down a little cooler unless it was a pretty cheap battery, in which case they like to fudge the numbers a bit. If this is a collective pitch helicopter, I would try lowering the head speed slightly to reduce the strain on the helicopter. If it is a fixed pitch, there is not much you can do unfortunately to save power. Come over to the forum and post this up and lets get some heads thinking on this. www.Rc-Help.com
Can i pair a 35c and a 50c lipo? both have 5000mah
So I still don't know what it means, just that I should use at least 35C or larger, but watching this video I still don't know what C is. Is there a unit of C? How do we apply it?
Can I use a 2s lipo 80c for Traxxas slash 4x4 without damaging anything. Been using 2s lipo 65c for my truck.
Yes, the C rating can never be too large. Using too low of a C rating will cause the battery to heat up. The only downside to using too high of a C rating is they are more expensive. www.Rc-Help.com
Any time you say go bigger in a youtube video you get an automatic like
So what you are saying is I should "Tim Allen" more things? lol. NICE!
All of these BS videos on the internet. Glad this one helped me.
Okay so my 5000mh with 20c gives me 100amp discharge and that is exactly how much I need, what about if my battery is half full, will It be safe for a battery to pull 100amps ?
I usually like to go with a little higher C so that I'm not maxing out my batteries discharge capability. Just keep an eye on the battery temp. If it is getting warm, you might look into a larger C rating.
I just fried my ESC 2s 5200 100c had two batterys in series making a 4s
based on the weight of your rc being runned on a single battery pack.. higher c rating means higher torque potential, higher brake power potential and higher acceleration potential.
higher c rating wont affect maximum speed.
Also too much acceleration is funny first, but it destroy your transmission and differentials...it is better to lower acceleration input by 50% on 2wd cars and 20% on 4wd cars. This way you stay in control and your car doesn't always do whellies. Also your differential will last longer.
If you decide to lower your gear ratio to have higher maxium speed. it is very important that acceleration input be reduce otherwise you cause big stress on the motor. This is where higher c rated battries offset can be used to gain back the lost acceleration. instead of putting all the stress to your motor, your battery is going to get stressed so your motor doesn'T over do it.
when doing those setups remember to apply auto brakes around 20% and brake power at maximum 50% This way your motor will remain warm and you will not deplete your battery too quickly.
There is a reason why huge tires are made for higher gear ratios... not for low ratios.. the transmission and the differentials.
when 4 small wheels turn very fast it is easy to make them stop or turn the other way around. Bigger wheels tend to disbalance if you turn to fast and braking them to fast will send all that energy/mass stright to your drive shaft and differentials..
anything can be done on rc cars.. and every rc cars can be lightning fast... but then there is physics..
Higher C Rating only means it can withstand a higher constant draw from the battery by other electronics. It has nothing to do with torque potential. If going to a larger C rating battery gives you more power out of your motor (I use "your" loosely here), then your current battery has a C rating that is too low. The battery is only a storage device. It gives out power to what needs it when they need it. If other items are requesting more power than the pack can handle, then things will start to slow down and the pack will start to get warm. And a warm-hot LiPo is never good as we all know. Thanks for the comment monsterrun.
Hi there I have a 2s 980mah 30 c.lipo What amp charge rates the best to charge thanks
Depends on the battery. 980mah would equate to the following:
1c charge rate - 0.98 amps
2c charge rate - 1.96 amps
Unless your battery states specifically it can handle a higher charge rate I definitely would not go over a 2c charge rate. But to make things easier, you can just use 1amp and 2 amps respectively. No need to worry about hundredths of an amp. www.Rc-Help.com
I got a question sir if i may, will a 2200 mah 20c battery give me the same punch in a multiroter as 1800 mah 25c?
You may absolutely ask questions, in fact I encourage it! In your application, the 2200mah 20c pack will give you 44 amps, the 1800mah 25c will give you 45 amps. So the smaller battery is theoretically able to give one amp more than the later capacity pack. However, your motors will only draw what they need. If you have motors that are only drawing 40 amps, then both batteries are going to be exactly the same as far as "punch" goes because the motors are determining that factor. However, if the motors are wanting 45 amps, then the 1800mah pack will give more "punch", but only because you have exceeded the maximum amp draw of the 2200.
With that said though, the 2200 is going to be heavier than the 1800 so even if your motors are only needing 40 amps, it may 'FEEL' like the 1800 has more punch.
To understand what I mean by the motor only drawing what it needs, take a look at the video linked below.
th-cam.com/video/LlSa2f76QiU/w-d-xo.html
If your C rating is to low can it hurt your battery? Thanks!
Yes, it can make the pack overheat, puff and possibly catch on fire.
What battery do you recommend?
They are all about the same pretty much. But Tattu is what I use, Pulse and Glacier are some of the best.
I suggest Everyone to buy zop power batterys, they Are soo Dubable and dirt cheap! I got like 10 of them, 4 2s, 2 3s and 4 4s (between 60 and 120c
I hope someone will also see this comment, you are right that ZOP is cheap i had checked it out, however the durability,,,,, hmmm, let us check it out too,,, anyway.... thank you sir for your very good recommendation and support.
@@augustestrellado1156 they Are good!! SOO Durable, i got those 4s for OVER 3 Years and they Are still on 95% health! Perfect
Thanks hey tony where you been no videos in a little while?
Hey bro, yea things went a little south for us here. First my well pump dies again, that's a grand out of pocket, then the washer and dryer start to go out then the fridge starts to go out and that forces me back into a truck driving again. First week in the truck and our granddaughter passes away and we are having to do all of that junk with DHS now since my grandmother has custody of the other granddaughter. It's been a nightmare here lately. I'm trying to get back on track though. Sorry for the delay. Hope to see you on the forum soon. I don't do much here on youtube at the moment (trying though lol) but I try to get on the forum every day.
RcHelpDotCom wow that's a lot to deal with, sorry for your loss
Yea, times are not good, but they will get better. Just sucks that it takes me away from what I love doing.
I have a 2s 220c
What happens if you mix c ratings if building a bigger battery ?
To keep it safe, you will need to know what the lowest C rating is in the pack, and never go above it, no matter what the higher cells are calculated at. I do not suggest building your own battery, but just know what you are working with. www.Rc-Help.com
@@RcHelpDotCom thanks, i have an ebike and was wondering if i could mix c ratings in parallel
Is it okay if may esc is 125a and my lipo rating is 110c ? Thankyou
I have no idea because you didn't tell me how much power your motor pulls. www.Rc-Help.com
@@RcHelpDotCom i don't exactly know but i think is 22v with 3100 kv motor
thinking if the 110c lipo might damage the esc?
Well, the 22v would be your battery, and there is no way of knowing how many amps a motor pulls from the kv rating, which only RPM per Volt. You can put a 9000C battery on anything, and it will not hurt it. The battery does not push the power, the motor pulls the power. So without knowing how many amps the motor is pulling, I have no way of knowing if anything is going to be damaged. www.Rc-Help.com
can i ask you something how much " c " is there in a 1200mAh 7.4v LiPo battery?
It doesn't work like that. "C" is a calculation from the manufacturer that is based on the internal resistance of the pack and what the pack can handle to discharge at one time. As a safe bet, you can calculate almost any battery at a 20c discharge rate unless the IR is extremely high. www.Rc-Help.com
can higher c rating than recommended damage my rc vehicle?
No, C rating is only the current limit that can be drawn from the battery.
My battery is a 3000 mah 30C, so 30×3000/1000= 90amps max discharge rate, my motor pulls 20A peak+ few amps for receiver and servos, I should be chilling in here ahaha
Yea, that pack shouldn't even get warm lol.
Is c affect the duration of playtime?
No, it only shows what the discharge capability is of the pack. the MAH is your flight time. www.Rc-Help.com
You know your batteries
And voltage
What about airsoft guns would it be the same
The Sonicwake V2 36, recamends 50c ratings ,my batteries are 80 C ,horizon Hobbies ,say I can go bigger,new to the hobby.🇨🇦80 c is better than 50c correct thanks
Not better unless your motor needs more than the 50c. Remember, the motor pulls power, the ESC only regulates power and the battery only stores power. www.Rc-Help.com
Does the same go for Airsoft ?
Yes, A battery is a battery.
Sooooo higher C rating means less flight time??
No, higher C rating means the battery can withstand a higher current draw. www.Rc-Help.com
It doesn't help that some batteries fudge their C ratings. My power hobby 50C/100C gets way hotter than my 25C/50C Traxxas
Over what period of time? C ratings are based on sub 10 second applications. The actual continuous c rating is 20c or less.
@@DaveElectric This was a while back and ended up being a defective battery. Power Hobby reached out to me and replaced it free of charge. The new one only gets warm like the others
Don't know or understand why anyone would want a 30C battery? I don't own any batteries less than 50C rated.
Those packs are quite old and that was the norm back in the day. I do agree though, the higher C you can afford/get, the better! Example, I have a new project I'm working on, Agusta A109 600 size electric, and I'm going to be running a Pulse 5000mah 6s 50c. Thanks for the comment V.E. www.Rc-Help.com
Ohhhhh that why my cheap ass battery is so easily Puffy.
If the "C" rating was explained , how come I am none the wiser ?
Because it wasn't.
So higher c rating means battery will drain faster?
Go out and get the highest C rated battery that you can find... Don't get more than 35...😏
Does he even explain what the C stands for??
1c = 2.2A discharge capacity
C is MAH divided by 1000. As Mamun2a stated, a 2200mah battery at a 1c rate would be 2.2 amps. at 2c, it would be 4.4 amps.
LOL! First comment!
You are always the first comment lol.
I'm usually last at everything else...second place is the first loser. LMAO!
This is a great explanation though.
Thank you kind sir!
You didn’t at all explain the c number. You simply said the higher the better. Stop making videos that waste people’s time
I'm running ads on my x max and my xrt and those LiPO batteries are Traxxas batteries that are only 25 C why do you think they go so low on their sea rating I'm just wondering because x-maxx and xrt run hard I never noticed the battery pack get warm or puffy yet I'm charging an 8000 me 130 C 15.2 volt lipo in my Redcat I have the amps set at 13.4 amp charge rate do you think that is okay for charging?