Another little goodie from CES 2013 was Tethercell. This Indiegogo project wraps a connectivity layer around a AAA battery to make it AA-sized, but makes it able to communicate to your iPhone over Bluetooth 4.0. With their iOS app, you'll be able to get notifications when a battery is about to die, set schedules for activation, and remotely activate and deactivate the device. It's a pretty neat idea, and the devs are open to the possibility of providing an API for other app developers.
Tethercell is still very much in its early stages, but even just a few days into the launch of their Indiegogo campaign, they're about a quarter of the way to their goal. You can snag one for $35, or a pack of two for $63, but the developer promises that once it reaches retail, prices should be lower. It's an interesting idea overall, and combined with a system like IFTTT, you could make your various battery-powered gadgets significantly more smart. Any takers? How would you like to use a system like Tethercell?