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"NewerTech's dual-bay MacBook (and MacBook Pro, too) battery charger / conditioner is most certainly tailored for the authentic road warrior, as it allows users to \"conveniently charge two batteries one after the other, or charge one battery while conditioning a second one.\" The device reportedly extends the maximum life and effectiveness of your batteries by doing the conditioning for you, but we're a bit bummed to see that it only charges the second Li-ion \"when the first battery is done charging.\" Notably, NewerTech also seems to offer the device for owners of PowerBooks of days past, but the latest rendition will run you $149.95 for the convenience. Another shot after the break."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2007/06/08/newertechs-dual-bay-macbook-battery-charger-conditioner/>