What bugs me about my LiPo batteries is all the information/disinformation out there about them. I am fully aware they can catch fire if handled improperly. I bought a set of them for my 1/6th scale tanks last year. What concerns me is that they are not that old and have only been charged a few times, but are "puffing up". One seems to be more puffed than the other.

This is them: https://hobbyking.com/en_us/zippy-fl...-30c-xt90.html

They seem to run fine and I can't tell if there is any capacity loss since it seemed to puff up after the first charge. I charged them both on a iMAX B6 RC Lipo NiMh NiCD Battery Balance Charger at what I thought was low amps (1A). The balance plug was used during charging. I read that the puffing isn't a good thing. They are 6S as the tanks were originally spec'd to run on 24V. I would prefer not to start my 1/6th scale KV-2 on fire by using a battery at risk, but I also don't want to go back to 12V lead acid batteries which is what was in it before. I was drawing so much current from the smaller 12V 7AH batteries that the cases were warped and bulged from the heat.