Motorola Original HNN9233: 7.5V/550mAh NiCD Rapid Rate Battery. Height: 2- 3/16", FM Rating: Intrinsically safe: IS/Class-1/Div-1/Group-C&D. Fits: 2 Watt P10, P50, HT10, SP50, SP21 NOTE: To avoid confusion, for ordering purposes, the suffix letter after the stock number is not listed.