If you look at the bottom of your Braun electric toothbrush
induction charger, you’ll see that it’s only set up for 110V only, rather than
the 110/220v setup most other devices get. This is annoying. The current
required by these toothbrushes for charging is so low and slow that there’s no
reason why the charger couldn’t be driven by a USB power source.
Well, it turns out that a third party manufacturer has made
precisely this charger. It takes a microusb input, and the other side is a
standard USB A interface, which means you can carry a standard charger on a
bike tour or sailing trip and charge it either from mains or from a power bank.
Having tried this on our tour, I have to say that it’s more
than satisfactory. It doesn’t charge very quickly. For instance, if you used the
toothbrush six times and then charged it overnight using the charger, it
wouldn’t charge fully overnight, but close enough that the motor doesn’t slow
down. Over a long trip, what you’ll discover is that you reach an equilibrium:
the more drained the battery is, the faster it charges, but it’ll never reach a
state of a full charge.
If you like using electric toothbrushes, this is a great
travel accessory, and you should probably never carry the charger that comes in
the box for the toothbrush when traveling. Recommended.
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