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After my second run of the day I opened the hatch to where one of the two lipos appeared to be puffed. I have never had this happen before, but I checked the voltage on the lipo (3.66,3.52)....I balance the cells when I charge them, but the lipo has maybe 10 runs on it. How much of a difference in voltage in cells is normal/okay? The battery is not puffed anymore, but I dont know what to do. I have kept it in a lipo-safe bag since I last ran it in case anything would happen. Should I try charging it and balancing the cells? The battery is a 2s zippy 45c 5000mah lipo. I figured that I am bound to have a bad cell here or there, especially when buying cheap lipos, but please let me know what I should do. If it helps, the matching battery in the pair reads 3.66,3.69. Thanks!
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The difference between 3.66 and 3.52 isn't all that great considering that is less than 0.6 v----a threshold I consider that is BADLY out of balance and a cause for concern.
More to my concern is how long you are running your boat, the voltage usually sags under load and it would have read below what you were reading, assuming that it would be a while before you were able to open the hatch and get to measure. So, you have run the lipos too low, never mind the LVC allows settings below that. I don't run my lipos below 3.7v.
Ten ( 10) runs on this kind of condition and no wonder your lipo is puffed.
Try to balance it and charge it back, next time make your runs shorter, time it consistently and you know how long it takes to deplete your battery until 20-30% reserve.
If it puffs every time and won't let you charge back as many mah as you have used, consider investing in new batteries. Dunk it in a bucket of fresh water mixed with salt, let it soak for a few days, you will see green/disgusting "thing" oozes out and your connectors/plugs would be corroded, but it will bring the charge to zero and be ready to safely disposed of.
I don't know how the quality of these Zippys are, ( never used them myself) but I will get the best lipo you can afford, also aim for a higher discharge "C" rating. Beware of some cheap lipos with very high ( inflated) "C" ratings.Too many boats, not enough time...
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I usually run them to around 3.4v per cell and have never had this problem before which is why I was wondering if it could be a bad cell.
Are there any specific lipo batteries you would recommend in terms of bang for your buck?Comment
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