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Philips Sonicare ToothbrushPosted on March 15, 2010. How does the pricing on a Philips Sonicare toothbrush work when there is no electrical contact? I have a Sonicare toothbrush at the bottom of it is rubberised.When relax in the charger there is no electrical contacts for the power to adopt m through.I "really curious to know how the system works pricing. L ol j ust wait until they release the new iPod docking thing works the same way conduction Buy electromagnetic induction. There is a coil in the toothbrush which converts the alternating magnetic field charger electricity. CommentsThere are no comments.Leave a Comment | Popular My Friends |