Sabrent Extended Battery Pack for GoPro HERO4, HERO3+, HERO3 [with Backdoor Housings for HERO4 only] (GP-KPHA) Rated at 3.8V and 1260mAh for extended battery life; Premium Japanese cells for longer battery life Displays battery level or charging status on camera and battery Fully compatible with the HERO4, HERO3+ or HERO3 cameras and all accessories. Can be charged using any standard USB charger