HQRP Phone Battery for AT&T LUCENT SL82518, SL82558, SL82618, SL82658, TL90078, TL92278, TL92328, TL92378 Cordless Telephone plus Coaster HQRP&reg; Battery plus HQRP&reg; Coaster; Battery Voltage: 2.4V; Capacity: 850 mAh; Ni-Mh; Nickel Metal Hydride battery pack; Compatible with Original Battery; 200 Days warranty.