An update on the Turnigy 2S2P LiFePo4 I am running. Well I am not running with them but my son is. He managed to puff one of the cells during an extreme discharge. I didn't notice that he was still trying to go up a hill and his truck was just crawling along very slowly. At one point the truck wouldn't even move and that is when I noticed what was going on and asked him to stop pegging the throttle.
But it was too late. I tried to revive the cell but it is completely dead. So I checked the stock status of HC and they are at zero right now. They are still just $25
So I'll wait 'till they come back in stock and get a new one. He still has another pair to play with.
He was running with no LVC so now I updated his MMM with a custom cut off of 9.2 V which is 2.3 V per cell. Should I go higher than that?
I didn't want to waste time trying to save the remaining 3 cells of the pack so I wanted to test the chemical stability of the LiFePo with very sophisticated equipment I happen to have. I hit it with a hammer! I punched 4 big holes in it and nothing. Nothing happened. No smoke, no fire, no smell, no heat. Nothing. I just had to find out for myself.