something all vaporers need to look at. The battery is a 320 mAh, the standard battery for a 510 is a 180 (or 120, but i think 180) That lets you know this battery last almost twice as long as a standard batt.
when you get into "mods" and such keep the [mAh} thing in mind it will answer alot of your "how long does this last" questions.
i hope this is helpful.