The charge time varies per Elf Bar model. The general rule of thumb is 10-30 minutes, depending on the Elf Bar’s mAh rating and how depleted it is. The lowest mAh is in the shortest charge time, and the same with the highest. The average time for charging 650 mAh is approximately an 30min. The Elfbar Bc5000 disposable will blink its indicator light when it needs to be charged, but if you charge before the indicator light blinks, it will obviously take less time than waiting until the battery is totally drained.