Solar Toothbrush
There are battery operated toothbrushes that are electronic and the bristles rotate. You are able to get your teeth cleaner, in a shorter amount of time. These toothbrushes are a bit expensive because you have to replace them because many are disposable. Still, others require battery replacements.
One option is a solar toothbrush. The rotating bristles can be powered by thin film flexible solar panels. The panels make is so that you never need to replace the batteries. Then, you simply replace the bristles every six months and you have an economical toothbrush.
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