Looking for an electric bike that does the peddling for you? You have plenty of choices, particularly if you're willing to drop over $2,000, but finding one that uses regenerative braking to extend the life of its meager on-board batteries isn't so easy. Panasonic's Vivi RX10S is about your only choice until February, when Sanyo's new eneloop-branded bike is set to start pulling weak (or just lazy) Japanese riders up up inclines before recharging itself on the way back down. On a hilly course a charge is said to last about 35 miles without braking, 46 by charging
