Originally Posted by BestNThDez

I had two 7.4v 5000mAh 40c (ProTek) batteries expand very badly and break open. Just wondering if there is a common thread here, IE- brand, maintenance, care. I'll be honest, the second battery I left in my SC10, connected to the ESC, with the power switch turned on, for about 5 days. I'm thinking that might have had something to do with the second one. Let me have it, I caused that, right??? (If I did, shouldn't a battery be able to be discharged and not "explode"??) I understand that the battery will be useless anyways for the fact of going below the 3.0 volts per cell, but shouldn't it not explode? I don't know.

The first battery has now excuse! Not plugged in, not connected, and found it exploded.

My question is, what thing/s in your experience or from what you've heard, will make a battery "explode" every time?