It recharges itself whenever it finds a wi-fi signal and never needs to be plugged into a power source. $40.
Politics in the Zeros
"A republic, if you can keep it." Defeat MAGA
Politics in the Zeros
"A republic, if you can keep it." Defeat MAGA
If you do the arithmetic (a wifi transmitter is limited to 4W output, and the surface of a sphere is 4Ï€r^2), it’s apparent that you’ll get a noticeable amount of charging only if you put the gadget next to the transmitter (at the very least, closer than a meter).
At how many public hotspots do you even know the location of the transmitter, let alone have close physical access to it? Cute idea, but I don’t see much of a future for it.