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## Product idea
A mouse pad that is also an inductive charger. It will charge **both** your wireless mouse continuously **and** your **smart watch**.
+bonifartius 𒂼𒄄
@freemo doesn't the strength of magnetic fields get weaker with some exponent of distance? i guess you really need to put much power into such a thing to get to the outer side of the wrist for a normally worn watch.
and most right handed people wear the watch on their left hand :)
@bonifartius yes magnetic field decay exponentially.. no it wont require exponential power.
The energy put into a magnetic field is recovered each cycle, presuming of course you design the device to not radiate into the far-field (which isnt really going to happen at the frequencies these things operate at the size of the pads).
so while you do need more instantaneous current/voltage to produce a bigger field, that is almost fully recovered and doesnt actually cost you anything.
Basically in technical terms when it isnt charging something it costs you now "real power" but exhibits what we call "apparent power"
@freemo may be interesting if you don't know it already: https://en.m.wikipedia.org/wiki/The_Awful_German_Language
@bonifartius We would say "He has just enough knowledge to be dangerous." I wouldn't be surprised if it comes from the germans.
Always cracks me up how all our sentance-long phrases boil down to a word or two in german :)