Replacement battery for Sensonic Plus SR-3000. Specifications: 700 mAh, 2.4V, Ni-MH. Compatible with: Sensonic Plus SR-3000, Sensonic Plus SR-3000E, 900 Sonic Toothbrush. Replaces: Waterpik BK-4MCCE. Waterpik replacement battery designed for Toothbrush devices. Simple plug-and-play replacement requiring no modification.