Advanced 1720 mAh lithium-ion batteries that boosts camera performance over standard GoPro batteries over a wider range of temperatures. Optimises charging so you’ll get fully charged batteries as quickly as possible. Uses USB Port for charging up to 38% faster when using optional GoPro Supercharger. Dual LED Lights display charging status of both batteries. Charges batteries in pairs. Charges batteries individually. Charging indicators. Pre-charged 1720mAh rechargeable batteries and pre-charged 1720mAh rechargeable batteries. Manufacturer’s 2 year guarantee. EAN: 818279028034.