Battery Backup Pack
When you're running out of battery and there's no way to charge your phone or other device the feeling can be utter helplessness. But there are inexpensive devices you can get to extend the life of your critical electronics.
myCharge Summit 3000 is my favorite personal gadget because it makes all my other gadgets more reliable. It's a battery backup pack that has charging cables for USB, microUSB and Apple's 30-pin connector built right in. (Support for Apple's new Lightning connector is coming soon.) For only slightly more you can get the PEAK 6000 model with twice as much power capacity. Unlike other less-expensive options, myCharge has built-in cables and a two-prong wall outlet, so it charges quickly and easily. During Hurricane Sandy I loaned mine to a friend, a photographer, who was able to get a lot of work done because of her extended device life. But there doesn't need to be a hurricane for the myCharge to save your butt.
-- Larry Seltzer