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Comment: Won't work (Score 1) 242

by QuasiRob (#44817787) Attached to: Wireless Charging Start-Up Claims 30-Foot Radius

So he claims 10% at 10 feet - so lets assume 10 watts input power

A 10 foot sphere has a surface area of 1257 sqft

1 watt over 1257 sqft is 0.0008 watts per sqft

Lets be generous and assume the whole of the phone case is a receiver.

A phone is about 10 inches sq, so a bit under 1/14th of a sqft.

0.0008/14 = 0.000057 watts. That isn't going to be much power for your phone.

That also assumes you left your phone facing the transmitter rather than edge on.

He who has but four and spends five has no need for a wallet.

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