HQRP Cordless Phone Battery for Lenmar CBC318, 508900A, ER-P730 Replacement/Extended / High-capacity/plus Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 3.6V; Capacity: 1200 mAh; Ni-Mh; Size: AA; 3 Cells; HQRP&reg; High-capacity Nickel-Metal Hydride Battery will give you twice as much talk time. Compatible with Original Battery; 200 Days warranty!