Hitech - Replacement HHR-P506A, BT-904, HHR15F2G1 Cordless Phone Battery for Some Panasonic KXTG Series Phones Capacity: 1500mAh Voltage: 2.4V Chemistry: Ni-MH, rechargeable! See description for list of compatible cordless telephones Replaces Panasonic HHR-P506A, and Uniden BT-904 batteries