I have since had 1 of 10 M2P batteries swell... it is retired. I got about 175 full battery flights from it. It swelled during flight and battery life dropped from 22 min to about 1 minute suddenly about 30 seconds into that flight.I just happen to browse thro and saw your comment on battery swelling. You are one lucky guy with no such problem. My friends who own MP have this problem just as I do. I have 8 batteries, (2 MP platinium bought separately and 6 from the 2 crafts that I have). Now I am down to only 2 unaffected ones.
Charge rate is controlled by circuitry inside battery, your “charger” is simply a regulated DC power supply.I too have seen this problem pop up in the last few months. I have 4 batteries for my M2P. Have had them since Sept 2018. 2 have moderate swelling 1 serious swelling and the last with very little. The last time I flew, upon landing the battery was actually popping out on one side. Very bad. That battery is getting retired. The drone could have fell from the sky. The batteries seem to puff up more when they get hot. I may begin zip tying the batteries in just for safety until I can get more. Is it normal for these expensive batteries to swell after 18 months ??? I'm beginning to suspect the charger is charging too fast and damaging the batteries.