While it may not be an alternative to lean on completely, the GearJuice rescue charger can be pretty handy if you are strapped even for a few minutes of talktime when your charge is running out. The GearJuice charger from IOGEAR can charge any miniUSB equipped device, be it your cell phone, portable media player, or your digital camera, providing up to 15 minutes of talktime in case of cell phones. As you can see from the picture below, the charger converts power from a single AA battery that fits into the body. It measures 23×23x66mm, which means just throw it in your suitcase and forget until you get to those you-never-know times.

Via Press