Wow thanks for the quick reply.... So other then the trickle charge there should be no problem. But what about the dual 18650 box mods, wouldn't it take about the same length of time to charge two 18650 batteries as opposed to one 26650 ? or does the MAH make a difference ? For me i don't give a $#!T I have multiple batteries charging all the time. I can build a regulated box and put in the USB charger as an "option". Either pop the battery out to charge or charge it via USB. Zamazam.... are you related to......Shazam ? I loved that saturday morning show