Replacement Battery for Waterpik Water Flossers


Replacement battery to fit certain Waterpik Water Flosser models. Includes some versions of the WP-450 and WP-360.


This is a new replacement battery to fit certain Waterpik Water Flosser models that were originally fitted with side-by-side battery packs, including later versions of the WP-450.

This battery is 49mm long, 14mm high and 28mm wide. Other sizes are available in our online shop. It is fitted with solder tags ready for you to solder it into your Waterpik and give it a new lease of life.

It is recommended that you open your Waterpik flosser first to double-check the measurements of your original battery.

  • Length: 49mm (suitable for replacing 48mm, 49mm, 50mm and 51mm long batteries)
  • Height: 14mm
  • Width: 28mm
  • Voltage: 2.4V
  • Capacity: 1800mAh (higher than original for longer running)
  • Chemistry: Ni-MH (NiMH)
  • Brand: GP Batteries
  • Solder tags fitted for soldering into place

This battery is a high-capacity replacement for the newer version of the Waterpik WP-450 Water Flosser that was fitted with a side-by-side battery pack, plus some other models such as the WP-360. Older versions of the WP-450, WP-360 and some other models were fitted with end-to-end battery packs so open up your Waterpik before ordering to double-check your original battery dimensions.

Also replaces certain original batteries of the same dimensions with some of the following markings, and others.

Waterpik battery markings:
Other part numbers starting GP130AAH…
2 x AA
Nickel Metal Hydride

The fitted solder tags will need trimming to fit your Waterpik flosser and may need to be folded back on themselves to match the polarity of your Waterpik.


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