This guide will show you how to open the Colgate Omron C200 toothbrush and repair it by replacing the internal Ni-MH battery. These are great, lightweight electric toothbrushes so are well worth repairing.
This battery replacement guide is based on the Colgate Omron C200 ProClinical toothbrush but also applies to various other Colgate Omron C-Series brushes such as the C250, 250+, 250 Black, C350, 350 Whitening and C600 ProClinical models. The model number of your Colgate Omron toothbrush is marked on the back or bottom of the toothbrush as shown in the photo below. Click to enlarge the photo and compare it to your toothbrush.
For other toothbrush makes and model numbers the battery replacement procedure is different so please see our other toothbrush battery replacement guides for these toothbrushes.
The basic method is:
- Open and dismantle the toothbrush handle
- Desolder the wire connections from the old battery
- Remove the old battery
- Solder in the replacement toothbrush battery
- Reassemble toothbrush handle
The battery replacement process for the Colgate Omron C200 ProClinical is detailed below along with lots of photos. Click on any photo to enlarge it.
Any damage or injury to yourself, your toothbrush or anything else is entirely your responsibility. This guide is for professional, educational usage only and is offered without guarantee or liability. Ni-MH batteries should be handled safely and the correct polarity observed.
Tools, Parts & Equipment
- Colgate Omron C200 ProClinical electric toothbrush
- Original charger
- Soldering iron with chisel tip: Electronics grade (about 18-25 watt)
- Solder: Lead-free silver solder with a flux core is recommended
- Craft knife e.g. scalpel, snap-off, retractable or Stanley type
- Small flat-bladed screwdriver: 2 to 4mm wide
- Small cross-head Phillips screwdriver
- Adhesive putty such as Blu Tack to hold the toothbrush to the work surface
- Replacement Ni-MH battery: Support us by buying one from ToothbrushBattery.com here
Remove the brushing head from the top of your toothbrush handle and then inspect the bottom of the handle.
Using the small flat-bladed screwdriver gently peel the black cover off. It is held on by a piece of sticky tape so it will peel off rather than pop off.
Using the same screwdriver or a craft knife gently peel off the sticky tape and stick it to the back of the cover as you will re-use it later.
Stand the toothbrush upright in a glass of hot (60 degrees C) water for 3 minutes to warm up the plastic and glue inside the handle.
Dry off the toothbrush and pry the pink rubber screw cover out of its hole with the flat-bladed screwdriver.
Remove the screw using a small cross-head (Phillips) screwdriver.
Start to pry off the bottom cap from the toothbrush handle. Be careful not to mark the plastic too much. You can use fingernails, a large blunt screwdriver or some sort of plastic prying tool or spudger.
As well as the rubber seal creating friction when removing the base cap there may be a little glue inside. Heating the toothbrush by standing it in hot water should have softened this enough to let you pry the cap out.
Below is the removed cap showing glue at the top.
Using the small flat-bladed screwdriver release the two white plastic clips by moving them away from the internal wall of the handle (arrowed below).
Push the top shaft of the toothbrush to start sliding the internals out and gently remove them from the handle casing.
Also remove the top shaft cover from the handle.
Below you can see the original battery installed in the toothbrush.
Remove the tape holding the battery into the plastic frame and save it for later.
Gently pry the battery out at one end:
Then the other end:
The original battery is a 2.4V Ni-MH type fitted with the positive terminal nearest the motor (red wire).
You can see the capacity of this original battery is 250mAh. The capacity dictates how long the battery will run for before it needs recharging again. You can fit a higher capacity replacement battery and it will run for longer between charge-ups.
Peel the tape off both ends of the battery and save it for later.
Gently scrape off the glue from both ends of the battery without breaking the wires.
Time to get that soldering iron warmed up and desolder the wires from the battery tags!
Compare the original battery with its 2.4V replacement. This new battery has a higher capacity than standard to give a longer running time between charge-ups. Please support us with writing these repair guides by buying your replacement battery through our secure online shop here at ToothbrushBattery.com !
Note the groove around the outside of the batteries at the positive ends (on the left).
Use a pair of sharp scissors to cut both tags on the new battery level with the outer edge of the battery.
You can test fit the battery in its holder if you like. Keep the wires clear and in their channels.
Fold both tags away from the plastic sleeving of the battery so the plastic won’t melt. Then tin the tags with solder.
You can now solder the wires to the replacement battery.
Once the solder connections have cooled you can fold the solder tags back against the battery.
Check that the battery will fit into its holder then slide it back out and re-apply the tape over the solder joints.
Fit the battery into its holder. Try not to crush the wires.
Re-apply the tape to hold the new battery into the plastic frame.
Note the notches in the shaft cover and see how they line up with the slots in the toothbrush frame. The small notch is at the top and the large notch at the bottom as arrowed below:
Fit the shaft cover to the toothbrush.
While holding the shaft cover in place and firmly holding the toothbrush internals you can test the new battery by pushing the power switch on the PCB, and then again to switch it off. If the brush will not switch on check your connections and also try holding the toothbrush mechanism in the charger for 10 seconds to reset it.
Gently slide the innards of the toothbrush back inside the handle casing.
Make sure the shaft cover is pushed fully in to place.
Push the base cap back in to the bottom of the handle.
Re-fit the securing screw. If you give it half a turn anti-clockwise first this will allow the screw to drop into its thread to prevent cross-threading.
Push the rubber screw cover into the hole to cover the head of the screw.
Stick the plastic cover back on to the base cap using the original sticky tape.
You now have a fully repaired Colgate Omron toothbrush!
Put the toothbrush on to charge for a full 24 hours then it is ready to use.
You can recycle your old battery at your local supermarket battery collection point or civic recycling facility.
Please leave any questions, tips or comments about your Colgate Omron C200 tootbrush repair below!