VINTRONS Rechargeable Battery 1800mAh For Spectralink 3645, PBP0850, PBP0850, Link 8030, BATT-BPL200, BPL100 Capacity: 1800mAh / 6.66Wh Type: Li-ion Volts: 3.7V Size : 61.90 x 38.00 x 14.20mm