Kingma AHDBT-401 2-Battery + Dual-Slot Battery Charger + Car Charger + EU Adapter for GoPro Hero 4
AHDBT-401 Battery: Actual Capacity: 1200mAh; Mark Capacity: 1200mAh; Voltage: 3.8V Battery Type: Li-ion battery Dual USB car charger: Input: 12~24V; Output: 5.0V 3.1A Dual USB Wall charger: AC: 100~240V 50/60Hz 0.4A; DC: 5V 3.1A