Ok guess im not finding the right info and almost blew myself up so here it goes. I use a bolt with the exstender. I use ultrafire xsl 18650 batteies and thought i would buy this IMR High Drain HYBRID CGR18650CH 3.7V 2250mAh Battery made by Panasonic just cause im going to go to a mod that uses high drain but heres where i get lost i put the fresh new bat above in and with in and went to try it in the bolt and almost had a thermo nuclear meltdown lol it got hot enough to melt the safty spring. I would think this battery would be alright in my mod as im not pulling high draw with a vivi at 1.8ohms so can someone let me no did i make a mistake with high drain? Any help would be appreciated ty