This is my modified 510 manual PT w/ inline 10440. The switch broke on the orig. I used a 3a switch from ratshack and added the leds scrapped from my flashlight mod, mounted in a 15ml juice bottle and capped with a DP bottle cap. Runs good off the inline batt and I have a homemade 4aa batt pack to charge on the go, I wish now that I had added a normally closed switch to the leds so I could vape w/o lighting up the room sometimes, but my 3rd mod is going to be my stealth vaper, so this works good for what it is...
and my simple usb batt box:
and my simple usb batt box:
