Description
This is a cosmetically imperfect Sanyo 3.6V Lithium-ion replacement toothbrush battery to fit the Braun Oral-B iO series of toothbrushes that take Lithium-ion (Li-ion) rechargeable batteries size 49mm x 14mm, including the iO3, iO4, iO5, iO6, iO7, iO8, iO9 and iO10 models. Not suitable for iO2 models which need 3.2V batteries.
Factory Seconds
These Sanyo batteries are now discontinued and we will not be getting any more in stock. However, we have a few of these cosmetically imperfect batteries left, categorised as ‘factory seconds’. The batteries have marks, cuts, nicks or other damage to the red plastic sleeving which have then been covered by tape. Please see photos for some examples of the exposed damage that might be on each battery. You will receive a battery with similar damage to that shown, and any exposed metal has then been taped over. The batteries are otherwise new and are in full working condition.
Please also see the latest model of iO toothbrush battery being fitted to new iO brushes at the factory, which we have available to buy at a lower price here.
Note: This product can only be delivered within Great Britain due to courier restrictions on Li-ion batteries. For international delivery outside mainland UK please see the local eBay links below for vendors who will deliver to your country.
- iO series toothbrush batteries on eBay.com
- iO series toothbrush batteries on eBay Australia
- iO series toothbrush batteries on eBay DE
- iO series toothbrush batteries on eBay France
- iO series toothbrush batteries on eBay NL
Please note that as an eBay partner we may receive a small commission if you make a purchase through our links. This does not change the price you pay.
It is strongly advised that you open up your iO toothbrush before ordering to double-check the measurements as some models are fitted with different types, lengths and diameters of battery. To help you we have published a guide how to open up the iO series toothbrushes and replace the battery here. For other models see our other battery replacement guides for instructions on opening various other models of electric toothbrush.
Battery Details
- Quantity: 1 battery
- Condition: Cosmetic damage to plastic sleeving
- Length: 49mm (suitable for replacing 48mm, 49mm, 50mm and 51mm long batteries)
- Diameter: 14mm
- Voltage: 3.6V
- Capacity: 740mAh
- Chemistry: Li-ion
- Safety Certification: UL Recognized Component Mark
- Brand: Sanyo
- Replaces original Sanyo and Braun OE Li-ion batteries
- Flat contact at both ends – observe correct polarity!
This Sanyo CH UR14500AC rechargeable battery is compatible with the Braun Oral-B iO series of toothbrushes, including the iO3, iO4, iO5, iO6, iO7, iO8, iO9, iO10, 6N, 7N, 8N and 9N models which have type numbers 3753, 3758, 3769, 3776, 3794, 3795 or 3796 marked on the bottom of the handle. It must be inserted with the same polarity (+/-) as the original battery. It is suggested that you photograph your original battery in-situ before removing it. Not suitable for iO2 models (Type 3770) which need a 3.2V iO2 battery.
Safety Certification
These Sanyo batteries as originally fitted to iO toothbrushes have been tested for safety by Underwriters Laboratories (UL). UL are an international technical testing establishment, and these batteries have received their Recognized Component Mark for components which is shown as a “reversed UR” symbol on the battery. Lithium-ion batteries can be more dangerous than other chemistries of small batteries if not manufactured very carefully, especially during charging/discharging. It is therefore important to only use Lithium-ion batteries that have been certified as safe in your toothbrush.
This battery is suitable for replacing various original Braun Oral-B Lithium-ion batteries of the same dimensions including ones with some of the following markings, and others:
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Li-ion cylindrical cell batteries marked: Braun |
Not suitable for replacing 3.2V, 1.2V, NiCd (Ni-Cd/NiCad) or NiMH (Ni-MH) type batteries. See our other products if your toothbrush has one of these batteries fitted.












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