Description
You are buying a replacement 3.2V toothbrush battery for the Braun Oral-B iO2 toothbrush (Type 3770).
This 3.2V battery is only compatible with the Braun Oral-B iO2 model of toothbrush which is marked with the Type number 3770 on the bottom of the handle. The iO2 was originally fitted with a 3.2V battery. It is not interchangeable with the similar 3.6V batteries used in other iO models and it is electrically incompatible with these despite being the same physical dimensions.
It is strongly advised that you open up your iO2 toothbrush before ordering to double-check the measurements as some versions might be fitted with different types, lengths and diameters of battery. To help you we have published a guide how to open up the iO series toothbrush and replace the battery. For other models see our other battery replacement guides for instructions on opening various other models of electric toothbrush.
Battery Details
- Li-ion Cylindrical Cell
- Length: 49mm (suitable for replacing 48mm, 49mm, 50mm and 51mm long batteries)
- Diameter: 14mm
- Voltage: 3.2V
- Capacity: 600mAh
- Chemistry: LiFePO4
- Part Number: 0602589724119
- Replaces original Braun 3.2V batteries
- Flat contact at both ends – observe correct polarity!
This rechargeable battery 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 replacing the iO3-iO10 model 3.6V (grey/red) battery, NiCd (Ni-Cd/NiCad) or NiMH (Ni-MH) batteries. See our other products if your toothbrush has one of these batteries fitted.
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: 3.2V 1.92Wh 600mAh 14500 lFpR15/50 IFPR15/50 Li-ion Li-ion 20 Li-ion20 MH46844 TI Type 3770 |





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