zlacker

>>asimop+(OP)
I want a thick clunky device without a screen that can run for 4-7 days without charging. Then i want 1) a normal size device, 2) a tiny one and 3) a tablet. These should be terminals, little more than a screen, a battery and some radio to communicate with the herefore mentioned brick that does all of the heavy lifting. It needs only 20-30 meter range. The brick may also feature a webserver captive portal with public bluetooth and wifi access.

>>theend+Ig
Except that the screen and the radio are 80% of power usage, so this doesn't help anything. For what most people do with their laptop/tablet/phone, the little bursts of CPU are effectively "free" — increasingly cheap with each process shrink! — while the IO is as expensive as ever.