Product Highlights: Conveniently charges 2 GoPro batteries simultaneously Optimizes charging so you’ll get a fully charged battery as quickly as possible Charges via USB port; for faster charging, use with the optional GoPro Supercharger (International Dual Port Charger) Includes a spare 1720mAh lithium ion rechargeable battery Dual LED lights display charging status of both batteries Allows you to charge your spare batteries while you use your camera