Griffin has made some terrific mobile products in the past, and their PowerDuo Reserve is a good portable power supply designed for an iPod or iPhone. It comes with a an AC charger and one for the car cigarette lighter.

It has a green light of a charge indicator on it, and when it plugs in, it begins to charge the iPod or iPhone right away. It is good for 24 hours worth of music, 6 hours of video, 2 hours of talk time, and 1 and a half hours worth of web access. You should be able to get the PowerDuo Reserve on the Griffin website for $59.99.

Tags: Griffin, Griffin PowerDuo Reserve, iPhone, iPhone, ipod, MP3 Players, PowerDuo Reserve