I have a 10s4p Samsung 30q pack(with BMS) that I only used once then I stored it for a few months. Today while rigging the positive/negative charging terminals I accidentally shorted it for a split second. I didn’t see any smoke and visually the pack looked fine.
Then I took it out for a ride. The battery got down to 92% then dead to 0%. I had to push the board back. When I got home it showed 92% again.
I don’t think it was a loose connection because the battery meter was still on showing 0%. I’m thinking that maybe because I shorted it the battery will die when it’s under load after a while?