 "GoPro Dual Battery Charger + (for HERO4) - AHBBP-401"@en AHBBP-401 Filmtools"@en
"
Charge two HERO4 batteries simultaneously
Power it with most standard USB power adapters, the GoPro Wall or Auto Charger, or a computer
Dual LED indicator lights 
Includes a spare 1160mAh lithium-ion rechargeable battery 
"@en 
 "GoPro Dual Battery Charger + (for HERO4 Black/HERO4 Silver) (GoPro Official Accessory)"@en-US "Camcorders - Page 2 | Come As You Arts"@en-US
"Compact Dual Battery Charger for HERO 4 batteries. Charge using any powered USB source (AC Adapter, Car Adapter, Laptop, etc.)."@en-US 