Upgraded Replacement Battery for Sonicare HX6200 Waterpik SR-3000 WP-900 2.4V

They also fit select models of the Waterpik SR-3000 Sensonic Professional, SF-01, SF-02, and certain versions of the Waterpik WP-900. Always check the polarity (+/-) before installation. Depending on the battery polarity required by your toothbrush model, you may need to adjust the solder tabs by folding them in the opposite direction.