This isn't really a home repair question, more a educational matter! We recently started using a Sonicare cordless electric toothbrush. The 'handle" fits in a recharger stand as expected - nothing unusual about that. The question is, how does this work? There are no contacts on the brush or in the stand! I'm sure it's not magic, but it is interesting! I wonder if this technology will find its way to cellphones and other rechargeable devices that still need contacts that get corroded.
Mark