HQRP 500mAh Battery for Garmin Forerunner 910XT GPS-Enabled Sport Watch 010-00741-20 361-00057-01 361-00057-00 910-XT + HQRP Coaster HQRP&reg; Replacement Battery plus HQRP&reg; Coaster; Battery Voltage: 3.7V; Capacity: 500 mAh; Li-Ion; 100% compatible with Original Battery; 200 Days warranty!