If your iPod seems to be running out of steam at the most inopportune moments, then the Griffin TuneJuice might be your kind of thing. Simply put, it is a backup battery for dockable iPod/iPod mini units which is powered by a 9 volt battery. I can’t even name the last time that I actually purchased a 9 volt battery, but maybe that’s just me. The TuneJuice will provide another 8 hours of life to a partially charged iPod, but only 4 hours if the iPod is completely drained. You can pick one up for $20 bucks.

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