The Jupio Lithium-Ion Battery Pack for GoPro HD HERO features a 3.7V output and 1100mAh capacity. It's a replacement for the GoPro AHDBT-001 and AHDBT-002 batteries, and it can be charged using any charger that supports these models. The battery is compatible with the GoPro HD HERO, HD HERO2, HD HERO 1080p, HD HERO 960, HD HERO Naked, HD Helmet HERO, HD Motorsports HERO, and HD Surf HERO. Featuring lithium-ion cells, it functions memory-free through charge and discharge cycles.