If you are having problems with getting your electric toothbrush to charge and run correctly after replacing the original battery with one of our replacements please take a look at the following tips.
- Make sure you have followed every step in the relevant guide on our website and re-fitted all the parts removed during repair.
- Sometimes when a new battery is fitted and the toothbrush is put on the charger it can take an hour or more before the toothbrush registers that is being charged, so the charge indicator might not show up immediately.
- Check the solder joints to ensure that there are no dry solder joints where you have soldered. Solder joints should be clean and shiny. Check that there are no short circuits between tracks or joints and no solder bridges or stray blobs of solder on the circuit board. Bad soldering is usually the cause of charging problems and it is essential that you get a good electrical connection otherwise the battery will not charge or run correctly. Some customers try to fit the battery without soldering so if you have left the old solder tags connected and tried to push-fit the new battery against them this will result in a high-resistance connection which will affect the sensitive electronics of the brush. Getting a good solder connection to the battery is essential.
- The copper wires from the charging coil inside the bottom of the toothbrush handle can easily and almost invisibly break so check that these are all fully intact and connected. There is a weak point where the wires are soldered to the circuit board so check carefully here. Sometimes with just one wire broken the toothbrush will appear to be charging but it won’t be recharging the battery.
- Some toothbrushes, especially the Braun Oral-B Triumph models, have a built-in self-calibrating battery meter which gets confused when the battery is replaced. The battery meter will show as ’empty’ even after a full charge and just a few minutes of use. This is because it is still calibrated to the old battery. Switch on your brush and leave it running constantly until the battery is completely exhausted and the motor comes to a halt. Then recharge the brush for 24 hours. Then leave it running constantly until the battery is completely exhausted again. The brush should now charge and run correctly.
- Certain newer models including some Triumph v2 brushes seem to have an electronic cut-off which gets confused when the battery is replaced. The cut-off will think that the battery is empty even after a full charge. Switch on your brush and leave it running constantly until the cut-off activates. Then put the brush on to charge for 10 seconds. Then leave it running constantly until the cut-off activates again. Keep trying this cycle of charging for 10 seconds then running until the battery is truly empty. Recharge the toothbrush for 24 hours and the brush should now run correctly.