This Jupio bundle includes two Lithium-Ion Battery Packs for GoPro HERO3/HERO3+ and a dedicated USB Compact Single Charger. The batteries are replacements for the original GoPro AHDBT-302 batteries. They feature a 3.7V output and 1200mAh capacity. Designed with lithium-ion cells, they function memory-free throughout charge and discharge cycles. The compact charger has a micro-USB power port. A compatible USB cable is sold separately.