Rechargeable Telephone Home Phone Cordless Ni-MH Battery for Panasonic P-P511 PP511 P-P511A ER-P511 HHR-P402 2400mAh NI-MH Rechargeable/Replacement Battery Voltage:3.6V, Capacity:2400mAh Compatible for : Panasonic P-P511 ER-P511 HHR-P402 KX-TGA270. Vtech I5867 Designed to meet or exceed performance of original battery Package: 1 X Battery