I'm new to vaping and read a lot of the forums, but I ordered the ego usb pt the same day i got my 510. The 510 batts only last me 30mins or so. Does the pt charge and allow me to vape at the same time while connected to usb? I'm thinking about getting the flashlight style large batt mods. I can't stand being without some battery juice. I'll be stalking the postman tomorrow. I need this battery.