This has happened to me on two dna200 3cell lipo devices.
I took them apart and both batteries appear to show signs of swelling but i am not sure because I dont know what they looked like before. Do lipo packs generally look like this.
Before they failed I noticed that they would get almost uncomfortably hot while charging, I had recently started to charge them solely in my truck (truck driver) using one of the cigarette lighter usb chargers. I am thinking this is the problem. The adapter i used in my truck might have been too high power or something.
Stats on adapter:Anker 4-port Adapter Output: 5V=9.6amps
I do have charging amps displayed on the dna200 screens but i didnt see anything out of the ordinary. Ususally around .96 amps when charging
