Using a dedicated high-current electric circuit, like those installed for electric ovens, these can recharge the MINI E in 4.5 hours. (With an ordinary mains socket, by contrast, recharging could take all day.) For cars with smaller battery packs, like the Smart, overnight recharging from a conventional socket is possible.

ECONOMIST: Rational consumer

Medis' initial Power Pack is designed to be a "socket in your pocket" that will allow cell phone and handheld-device users to recharge their gadgets without plugging into an outlet.

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