3 ms·
They claim to reach 70% efficiency, by transmitting power on the wifi bands, and compare it to a charging mat (90%), and tout 15 feet distance, but leave out on
by Mithaldu 12y ago
They claim to reach 70% efficiency, by transmitting power on the wifi bands, and compare it to a charging mat (90%), and tout 15 feet distance, but leave out one detail:
How quickly efficiency drops off.
I suspect you only get 70% if your phone is literally on top of the router, and that the efficiency drops of very quickly to 0 as you approach the range limit.
- richardwhiuk 12y agoThe suspicion is that the 70% efficiency is how much of the power arriving at the phone can be used for charging it, not much the transmitter is supplying.
- johngd 12y agoMy car's USB port can barely charge my Samsung Galaxy 5.... I can't imagine how long it would take via radio wave.