Powerextra 3.7V 2500mAh 2 Pack Replacement Battery for Garmin HD Action Camera 010-11654-03, Alpha, Montana 600, 600 CAMO, 600T, 650, 650T, Monterra, P11P15-04-N02, Virb, Virb Elite Rated 3.7V and 2500mAh, you won't worry about the energy supply anymore with these 2 high capacity backup battery Compatible with Garmin HD action Alpha, Virb, Elite, Montana series Premium Li-ion battery without memory effect, you could charge them any time you want Integrated microchip prevents overcharging, over voltage and over heat, ensures durable and stable performance Powerextra provide all premium batteries with 30 days money back guarantee.