Over on our sister website we have published a new guide to replacing the battery inside the Waterpik WP-450 water flosser and other similar Waterpik models. You can read the full Waterpik WP-450 battery replacement guide online now.
We are also stocking the new batteries here in our secure online shop so buy your replacement Waterpik flosser battery now!
My battery and charging problems were solved by spraying the plug and pins with contact spray. Corrosion completely prevents the waterpik from charging I highly recommend to try this first!
Help my water pick is about 2 years old and the part that my batteries go in the little coils broke off (2) of them can I replace e the bottom where the batteries go or should I buy another one? I am on a limited income! Thank you Janice Wertz
What is the model number marked on your Waterpik?
HOW TO REPLACE THE BATTERY IN MY WP871W
Hi Rick, Your WP-871 toothbrush and the similar WP-860, WP-861, WP-862, WP-872, WP-881, WP-882 toothbrushes from Waterpik will open up in the same way. The older toothbrushes from Waterpik had a groove across the bottom of the handle which you could use a coin or large screwdriver to undo an eighth of a turn. Does your brush have this groove?