Overcharging will damage your cells and reduce their lifespan. Never exceed 3.65V when charging LiFePo4 cells. Never let your cells or batteries sit at high SOC for an extended amount of time. Thanks for watching!
Wow. That's crazy. Imagine if this were Lithium. My powerbanks did not do well after a year. This bulged, my powerbanks bloated up and popped at the seams.
I have a 200ah x 12v battery, the charger that it always has shows 14.6v at rest, at 0.1 amp charge, when the inverter is used it recharges at 20 amp when it is full it leaves it at 14.6v, the charger never disconnected it of the battery, I would like to know if keeping the battery at 14.6v is fine, thank you, your video is very good
It's perfectly fine.. those plug-in chargers will charge to 14.6 or (3.65v) per cell, and that's totally fine. If you are using your battery regularly It's perfectly fine. When you want to store your battery for months on end without using it, that's when you want to discharge to around 40%. I personally like to use a 90/10 or 80/20 cycle on my inverter settings just to get the max life out of the cells. 90% top and 10% bottom. That's a good battery you have if it's holding 14.6v. What brand is it.. thanks for watching!
@@natesdiysolar Thank you for answering, the battery is an ampere time brand, 200ah x 12v, I feel calmer with your opinion, I bought a new victron blue smart 20amp charger, I can change the types of charging via bluetooth, it keeps it at 14.2v , but I know that I am within the normal range, I was waiting for your answer, thank you once again, I am from Venezuela, I bought through Amazon and in a week I received the new charger
@ricardo limongi no problem. I have 2 ampertime 24v 200ah batteries myself. They are pretty good. Iv used them for 8 months now. I'll be posting a video soon about my solar power station with these batteries.. glad to help. I love Victron equipment... very good quality.
So did you accidentally charge it to 3.85v, notice this error, and remove it from the charger? How long was it at 3.85v on the charger? Also was it bloated when you noticed you overcharged it, or did the bloating come after sitting for some time? Thanks
Hi Brad. I did, in fact, accidentally charge to 3.85v. I was cycle testing a bunch of cells using the ZKE tester and must have not noticed the voltage when removing from the tester and went on to the next cell. It was slightly bloated before testing, but after sitting for a couple of weeks, it had expanded even more. The bloating was not immediate.
I had to use a lithium phosphate start battery for my boat when my agm in my car crapped itself out bush on the coast i left it the lithium for two weeks in my car before swapping it out. would my car alternator have done bad things to the battery as it would have run more charge the battery is holding charge fine but i'm hesitant to use it in my boat in car if damaged it. Btw interesting video.
It should be ok. Check this out. enjoybot.com/collections/deep-cycle-lifepo4-battery?gad_source=1&gclid=Cj0KCQjw8pKxBhD_ARIsAPrG45msO7Jkeo05wV0UCmtX45ygGywmLfSFUutvVnQuFMTFJJwFPGHFxXQaAulbEALw_wcB
i got some segway batteries and it says lithium ion on it so i assumed the cells were li ion. turns out i tested them as li ion but they are actually life po4. so it tested charged them to 4.2 volts!
@@natesdiysolar nothing noticeable happened. i discharged it and it quikly dropped to 3.2 volts and held there ebfore dropping down to 2.6 volts so it clearly was a life po4 cell. oops
Interesting. I would not have thought you would see such a big change at 3.85V. I recently did some experiments with some crappy LiitoKala 100aH to see if the leakage current (the current required to keep the voltage at a set value) changes with higher voltage (just curious). so I ran 2 days each at 3.65, then 3.85 and then 4.05V. I am not sure if they bulge more than before. I will have to re-run a capacity test. The result was the current needed to keep a steady voltage after 2 days, went from about 1mA at 3.65V to 1.8mA at 3.85V to 2.5mA at 4.05V. Maybe I should try 2 weeks. Now I am intrigued. I think some battery manufacturers set their HV cutoff to 3.75V. That is getting uncomfortably close to 3.85V... (My own batteries I charge at 3.45V (absorb) with a cutoff of 3.65V.)
Ya I think the key parameter is time... the ZKE tester has a range of 0 to 5v so it's possible it went to 5. The resting voltage was at 3.85 when I noticed 2 weeks later.. it could have dropped by then.. thanks for the info and thanks for watching!
Those cells did not swell up because you overcharged them to 3.85, that happened because the grade B cell poo the bed and poof up. 3.85 Is not enough to cause this big belly action. I have seen it take like over 5.0 volts for this to happen.
@@natesdiysolar Dang man...Maybe 3.85v for a long period is enough can cause this. I have seen a BMS charged to 4.2 but that was because I left it as the LIPO setting, however I fixed this pretty quick though did not leave them for a week.
Overcharging will damage your cells and reduce their lifespan. Never exceed 3.65V when charging LiFePo4 cells. Never let your cells or batteries sit at high SOC for an extended amount of time. Thanks for watching!
Wow. That's crazy. Imagine if this were Lithium. My powerbanks did not do well after a year. This bulged, my powerbanks bloated up and popped at the seams.
I store my powerbank at 50% charge whenever possible.
I have a 200ah x 12v battery, the charger that it always has shows 14.6v at rest, at 0.1 amp charge, when the inverter is used it recharges at 20 amp when it is full it leaves it at 14.6v, the charger never disconnected it of the battery, I would like to know if keeping the battery at 14.6v is fine, thank you, your video is very good
It's perfectly fine.. those plug-in chargers will charge to 14.6 or (3.65v) per cell, and that's totally fine. If you are using your battery regularly It's perfectly fine. When you want to store your battery for months on end without using it, that's when you want to discharge to around 40%. I personally like to use a 90/10 or 80/20 cycle on my inverter settings just to get the max life out of the cells. 90% top and 10% bottom. That's a good battery you have if it's holding 14.6v. What brand is it.. thanks for watching!
@@natesdiysolar Thank you for answering, the battery is an ampere time brand, 200ah x 12v, I feel calmer with your opinion, I bought a new victron blue smart 20amp charger, I can change the types of charging via bluetooth, it keeps it at 14.2v , but I know that I am within the normal range, I was waiting for your answer, thank you once again, I am from Venezuela, I bought through Amazon and in a week I received the new charger
@ricardo limongi no problem. I have 2 ampertime 24v 200ah batteries myself. They are pretty good. Iv used them for 8 months now. I'll be posting a video soon about my solar power station with these batteries.. glad to help. I love Victron equipment... very good quality.
So did you accidentally charge it to 3.85v, notice this error, and remove it from the charger? How long was it at 3.85v on the charger? Also was it bloated when you noticed you overcharged it, or did the bloating come after sitting for some time? Thanks
Hi Brad. I did, in fact, accidentally charge to 3.85v. I was cycle testing a bunch of cells using the ZKE tester and must have not noticed the voltage when removing from the tester and went on to the next cell. It was slightly bloated before testing, but after sitting for a couple of weeks, it had expanded even more. The bloating was not immediate.
I had to use a lithium phosphate start battery for my boat when my agm in my car crapped itself out bush on the coast i left it the lithium for two weeks in my car before swapping it out. would my car alternator have done bad things to the battery as it would have run more charge the battery is holding charge fine but i'm hesitant to use it in my boat in car if damaged it. Btw interesting video.
It should be ok. Check this out.
enjoybot.com/collections/deep-cycle-lifepo4-battery?gad_source=1&gclid=Cj0KCQjw8pKxBhD_ARIsAPrG45msO7Jkeo05wV0UCmtX45ygGywmLfSFUutvVnQuFMTFJJwFPGHFxXQaAulbEALw_wcB
i got some segway batteries and it says lithium ion on it so i assumed the cells were li ion. turns out i tested them as li ion but they are actually life po4. so it tested charged them to 4.2 volts!
Oh man. What happened. Usually they are li ion
@@natesdiysolar nothing noticeable happened. i discharged it and it quikly dropped to 3.2 volts and held there ebfore dropping down to 2.6 volts so it clearly was a life po4 cell. oops
Looks like they was NOT compressed as producer says.
No amount of compression would prevent such things.
How long did you keep them at 3.85 like for a day? A week?
2 to 3 weeks, I noticed it.
Interesting. I would not have thought you would see such a big change at 3.85V.
I recently did some experiments with some crappy LiitoKala 100aH to see if the leakage current (the current required to keep the voltage at a set value) changes with higher voltage (just curious). so I ran 2 days each at 3.65, then 3.85 and then 4.05V. I am not sure if they bulge more than before. I will have to re-run a capacity test. The result was the current needed to keep a steady voltage after 2 days, went from about 1mA at 3.65V to 1.8mA at 3.85V to 2.5mA at 4.05V.
Maybe I should try 2 weeks. Now I am intrigued.
I think some battery manufacturers set their HV cutoff to 3.75V. That is getting uncomfortably close to 3.85V... (My own batteries I charge at 3.45V (absorb) with a cutoff of 3.65V.)
Ya I think the key parameter is time... the ZKE tester has a range of 0 to 5v so it's possible it went to 5. The resting voltage was at 3.85 when I noticed 2 weeks later.. it could have dropped by then.. thanks for the info and thanks for watching!
Those cells did not swell up because you overcharged them to 3.85, that happened because the grade B cell poo the bed and poof up. 3.85 Is not enough to cause this big belly action. I have seen it take like over 5.0 volts for this to happen.
That is possible. The ZKE tester goes to 5v. 3.85v is where I was when I found it.
@@natesdiysolar Dang man...Maybe 3.85v for a long period is enough can cause this. I have seen a BMS charged to 4.2 but that was because I left it as the LIPO setting, however I fixed this pretty quick though did not leave them for a week.