Okay, I was out driving my stock E-Revo. I ran it for 5-8 minutes or so. When I powered off the ESC, a second later, I saw a puff of smoke. I opened up the top and it was coming from one of my battery packs.
I was using 2 Venom 5000 NIMH 7 cell packs. I pulled them out and on both, the plastic wrapping is melted a bit down at the bottom of the pack. One of them obviously fried a cell. So, I assume that pack is done. But, they were almost brand new! I'd charged/run them maybe 4 times. They were cool when I started running the truck...I can't imagine that they heated up enough in 5-8 minutes of relatively aggressive driving that it would fry one! Any ideas what happened here?
The batteries were pretty hot when I pulled them out...but not so hot that you couldn't touch them or anything. Didn't seem like they were way too hot. But I don't know, obviously.
Was I running them too hot? Is there something I need to change? Or are they just terrible quality batteries?
I don't know what would make them both get so hot this time when I've run them several times for longer spans and they've been fine.
Any help would be much appreciated!