Braun Oral B

Can't speak for all, but the two Oral B chargers I have have different power ratings.

PA

I've had several over the years and they seem to be interchangeable. Not doubting the other poster's observation that some have different ratings.

I have bought USB Oral B type chargers (i.e. a brush charger that can be connected to a normal charger for a phone etc) which are useful for taking on holiday where the power sockets are different. I did find that these chargers would not charge one Oral B electric brush tha I own.

I also have a Philips electric brush. Its charger has a smaller pin so it can charge an Oral B brush. The Philips brush does not fit on the Oral B charger.

No. Depends on the number of cells and what type of battery they are and to some extent on how cheap the device is. Charging in series is hardly every a good way to preserve life. Brian

"Brian Gaff \(Sofa\)" snipped-for-privacy@blueyonder.co.uk> wrote in news:rv8an1$ocg$ snipped-for-privacy@dont-email.me:

When I have stripped one there was only one cell Brian.

Yes, we have found that Oral toothbrushes charge quite happily on a Philips charger, quite handy as it avoids having to have two chargers.

At some point in the last 20-odd years they changed something that meant incompatibility of new and old. (I /think/ some say the frequency.) They also changed from "dual voltage" to separate chargers for different regions.

Brian, Braun toothbrushes use wireless, high-frequency inductive charging.

We upgraded from an older NiMH toothbrush to a new Li-ion one and the existing wall-mounted charger/head holder worked fine.

I got one with a europlug charger years ago (to assist with holiday plans) and have continued to use the same charger with successive toothbrushes.

About 20-50kHz

PA

Not sure I'd call it wireless. Just a loosely coupled transformer. Small because it's not 50Hz. :-)

Feel free to edit the article if it's wrong.