Battery2go - 1 year warranty - 3.7V Battery For Spectralink PBP0850, 8020, BPL200, PBP0850, BATT-BPL200, BPL100 Capacity: 1800mAh / 6.66Wh Type: Li-ion Volts: 3.7V Size : 61.90 x 38.00 x 14.20mm