SPECTRALINK BPL200 Cordless Phone Battery Li-Ion, 3.7 Volt, 1800 mAh - Ultra Hi-Capacity - Replacement for SPECTRALINK BPL100/200/300 Rechargeable Battery Replacement Battery for SPECTRALINK BPL100/200/300 - Li-ion, 3.7 Volt, 1800 mAh. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark