You'll never find a more suitable battery than the Original UTStarcom G'zOne Boulder Standard Battery, BTR711 for replacement! Carry a spare, for the just-in-case scenario with a trusted Original UTStarcom G'zOne Boulder Standard Battery because you just never know at which critical hour that important call must be answered. Your girlfriend / boyfriend might leave an important message for you to go to the airport, and because that call was missed, now they're stranded with crowds of people. The battery is great being small, lightweight, and compatible with the G'zOne Boulder. To ease your mind off poor quality you can be at peace knowing this quality battery is a product of Japan meeting quality tested standards. So get your backup battery today! Original UTStarcom G'zOne Boulder Standard Battery features Casio Branded Battery Light-weight battery attached to door Long battery life Perfect for replacement/ or backup Original part #: BTR711 Specifications 800 mAh 3.7V Li-ion Phone Model: G'zOne Boulder Made in Japan Do not expose to temperature 140 F / 60 C Original UTStarcom G'zOne Boulder Standard Battery, BTR711