Panasonic P-P301 Cordless Phone Battery Replaces battery for pan kxt3908, kxtc100, c180, kxt3980, 4310, 4360, 4500, 4550,3800, 3620, 3720, 3730, 4200, 3910, 4300, 3705, 3848, 3980, 3860, 3855, 3870, 3875, 3935, 3950, 3965, 3930 [pan kxa36a] 3.6v/300mAh Nickel cadmium