Energizer Holdings NH50BP-2F4 Battery Cell Size: D - Button Top Battery Type: Nickel Metal Hydride (NiMH) Capacity: 2500mAh Number Of Cells: 4 Rechargeability: Yes Structure: 1 Row x 4 Cells Side to Side Termination Style: Solder Tab Voltage - Rated: 4.8V Other Names: N701-F041