Here’s a reasonably priced iPod-compatible quick battery charger from Energizer. Buy.com is selling it for $9.99, while most similar iPod/iPhone battery backup solutions are going for more than double that amount.
The Energi to Go uses two AA batteries and can fully charge an iPhone in 2 to 3 hours – it’ll charge any dockable iPod as well, with smaller iPods getting multiple charges before the batteries need to be replaced.
Energizer Energi To Go Battery Charger [Buy.com via dealnews]