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Imagine this scenario: you’re stuck in the middle of nowhere, you car has probably broken down and you’re very far away from any civilization. The only thing that can connect you to the outside world for your rescue would be your mobile phone, provided you can get a signal. Now how long will this phone last you? A few hours at best, would be the normal answer.

Xpal Power (the company behind Energizer) has developed a mobile phone that is able to outlast most, if not all, of the battery life of the phones we are used to. Known as the SpareOne, it is said to be able to run up to fifteen years.

The SpareOne is able to run on just a single AA battery, and it is made to be used as an emergency phone, so I doubt we’ll bee seeing it run like our fancy smartphones today. I can foresee it as extremely useful for emergency situations, as the phone will transmit its location as well as its caller ID to the receiver.

It would be great as a backup phone, allowing you to make calls without having to worry about keeping your main phone charged up all the time. The phone is also said to have up to 10 hours of talk-time.

There are plenty of places to implement such a phone, especially for travelers to foreign countries, or adventurers who are in need of a handy backup.

The SpareOne will come equipped with Energizer® Ultimate Lithium AA battery and a Micro SIM card when it is available in the US in Q1 of 2012 for US$49.99. Different versions are set to be released for the US, Europe and Asia.