USed this on my Water Pik sonic toothbrush
My electric toothbrush battery was failing. A full overnight charge was only allowing 30 seconds of brushing... dead. Water Pik's only option is to buy a new sonic.<br /><br />A Youtube video showed me how to open the case and get to the batteries, so I bought them. Easy solder to do, and reassemble. Holds a charge for over a week, now.
Rating: 5 stars