so i was using my joye 510 mega battery today at the computer and it died. so time to charge grabbed out my 510-t batt charger and plugged her in. 20 min later i am at my computer reading these forums and i hear and sizzling popping sound coming from the battery that is charging! i rush over and its super hot and leaking acid all over my carpet. stupid me i put the reg 510-t charger on it and not the 510 charger. i forgot you cant use a 510-t charger on the mega batteries i was told this by ashley at ecigexpress thats why i ordered the normal 510 charger and it sits in my drawer next the 510-t one.. so i blew up a mega 280mah battery... oooops. that was my bone head play of the day. so incase you were all wondering "i wonder if a 510-t charger will work on a 510 mega battery" NOPE! melts them instead. so i threw out the battery along with the 510-t charger. you can however charge the 510-t batteries with the normal 510 charger.