This is a top quality Sony Lithium-ion replacement toothbrush battery to fit the Braun Oral-B iO series of toothbrushes that take Lithium-ion (Li-ion) rechargeable batteries, including the iO4, iO5, iO6, iO7, iO8 and iO9 models.
Note: This product can only be delivered within the UK due to courier restrictions on Li-ion batteries. For international delivery outside the UK please see the links below for vendors who will deliver to your country:
- Li-ion toothbrush batteries on eBay.com
- Li-ion toothbrush batteries on eBay Australia
- Li-ion toothbrush batteries on eBay DE
- Li-ion toothbrush batteries on eBay France
- Li-ion toothbrush batteries on eBay NL
It is strongly advised that you open up your toothbrush before ordering to double-check the measurements as some models are fitted with different types, lengths and diameters of battery. See our battery replacement guides section for instructions on opening your toothbrush and replacing the battery.
- Length: 49mm (suitable for replacing 48mm, 49mm, 50mm and 51mm long batteries)
- Diameter: 14mm
- Voltage: 3.7V
- Typical Capacity: 680mAh
- Chemistry: Li-ion
- Brand: Sony
- Replaces original Sony and Sanyo Li-ion batteries
- Flat contact at both ends – observe correct polarity!
This battery is compatible with the Braun Oral-B iO series of toothbrushes, including the iO4, iO5, iO6, iO7, iO8, iO9, 6N, 7N, 8N and 9N models which have type numbers 3753 or 3758 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.
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:
|Li-ion cylindrical cell batteries marked:
Not suitable for replacing NiCd (Ni-Cd/NiCad) or NiMH (Ni-MH) type batteries. See our other products if your toothbrush has one of these batteries fitted.