Batteries... The bane of my box... Well not since I made my power supply eliminator.. Get.. 1 d cell 9amp hour battery those with solder tabs, some thick sound system wire( power type), silicone tubes, two sizes in diameter.. The idea, build a dummy AA batt.. Some shrink wrap many sizes, diameter.. Do.. 1. Cut tabs off, as close to batt...what's left will solder.. Just don't cook battery past hot to touch. Keep tabs! 2. Solder the wires red to plus black to minus.. Make wire length good enough to go comfy from jean pocket to your head plus 2foot. This lets you route wire up shirt through sleeve. 3. Get your silicone tube (small tube). Insert the other end of red wire so it exits with an inch or more. 4. Put this assembly into the bigger silicone tube..this makes the AA battery diameter( choose silicone to suit ok) could make it from wood... 5. The tabs go to the outside of tubes. Bend them over and form them to suit shape of the dummy AA ok. 6. Join both with fat wire on the none insert to Mflb side of dummy AA. Then use thin wire to wrap insert side together mechanically and electrically. 7. Solder black wire to non insert end of dummy. 8. Trim positive to size and tin with solder until it gets to positive button of AA battery size. Tin the batt tabs until tight fit is archived in Mflb battery hole. It will wear over time, just tin with more solder to restore. That's it battery power hidden in your sleeve is the dummy join to Mflb and vape. If you get good you can one hand it; all so sneaky, rub your nose as u suck that box.. Hidden in your rolled fingers! Basically a dummy AA cell connected to a 9ah nimh battery.. Simple dependable power.. Use a plug then you can have many batteries.. Just put the condom on like you do on those AA batteries.. Or theft burn when they meet keys etc... Be careful, 9ah is lots of instant current, that light will... Glow..