HQRP Battery for LOGITECH F540 G930 Wireless Headset 981-000257 533-000074 981-000277 F-540 G-930 + HQRP Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 3.7V; Capacity: 700mAh; Li-Ion; 100% compatible with Original Battery; 200 Days warranty!