We have two battery models available for your phone, Panasonic made HHR-P301 . Or Battery Barn made BAT-301. Works for Panasonic , SONY , Toshiba and many different brands' phones. BAT-301--- Ni-Cad battery, 3.6 V , 300 mah. Dimensions at 1&11/16" L x 1&1/8" W x 9/16" H. This battery is made by Battery Barn. You will have one year's warranty from Battery Barn. Priced at $4.95 .