Non contact charging technology has been used in cordless toothbrushes for many years. You have a transformer primary and core in the charger base, and the secondary plus charging circuit and batteries is in the toothbrush. When on the base, magnetic coupling allows energy to be transferred to the toothbrush without wires. The efficiency is poor however, due to the the size of the 'gap' or distance between the the transformer core and secondary winding.
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Non contact charging technology has been used in cordless toothbrushes for many years. You have a transformer primary and core in the charger base, and the secondary plus charging circuit and batteries is in the toothbrush. When on the base, magnetic coupling allows energy to be transferred to the toothbrush without wires. The efficiency is poor however, due to the the size of the 'gap' or distance between the the transformer core and secondary winding.