Japanese carrier Willcom has hooked up with Sanyo to show off a back-to-basics handset powered by a single AA battery -- one of Sanyo's own Eneloop rechargeables, naturally -- that still manages to serve up 5 hours of talk time and 250 hours of standby. Just how back-to-basics are we talking, exactly? For starters, the phone lacks a display, pretty much ending any hopes of using this thing for gaming, video playback, or seeing who the heck is calling. In exchange, though, you get power versatility that's pretty much unmatched by any other phone on the market and an array of nodules that gently massage the side of your face while you're trying to hold a conversation. Between the perfectly round shell (looks like an AA battery, get it?) and the fact that it'll only get down with PHS networks, we hope this sucker goes through a few revisions before it sees production -- but we like where Sanyo's head's at.

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