Battery Share Sends Alerts to Your Friends When Your Battery Is Low
iPhone: If you have a friend (or several of them) who always seems to be running low on battery, Battery Share is an app where you can easily share your battery level with a select group of friends.
For the Battery Share app to be useful, you and all your friends need the app. From there, it works like a social network for your battery. Anyone you approve as a friend can see your battery percentage and they can see yours. Optionally, you can configure it to receive alerts when someone runs out of battery. There is also a built-in VoIP tool, but for most of us this is not particularly necessary. That said, Battery Share is pretty smart and useful, albeit a small niche for most of us.
Battery share (99 cents) | iTunes App Store via MacStories