USB-powered Sega Nomad gives you near-endless game time

Sega’s Genesis Nomad was always something of a compromise (it was running 16-bit console games on mid-1990s handheld tech), but the battery life was a particularly sore point: it took six AA batteries just to get 3 hours of play time. Wouldn’t it be nice if you could use modern hardware to play without constant (and sometimes expensive) battery swaps? …