Having problems with the battery life for your iPhone or Android smartphone? XPAL Power, the company behind Energizer and PowerSkin, has a solution to your phone's battery life with SpareOne, a super-cheap phone that runs on one AA battery.

According to XPAL Power SpareOne is the only cell phone in the world that runs on a single AA battery. Best of all it could reportedly maintain its charge for up to fifteen years. SpareOne isn't a cell phone developed for techies. The dual-band GSM phone is specifically designed for emergencies, worldwide travel and situations when accessing power is not an option. Users can pre-program important phone numbers for easy access for emergency services.

"SpareOne's breakthrough technology provides an unprecedented lifeline during dire situations that require an emergency response," said Alan Cymberknoh, SpareOne Project Director at XPAL Power.

"By operating on a single AA battery, SpareOne solves so many daily issues, serving as a simple back-up phone you can carry without worrying whether it's charged or not. It can be left in a car for emergencies, used by hotels who want to pre-program concierge numbers for guests, passed to your children or parents to maintain an open line of communication - it's essentially designed to make and receive the most important calls, no matter what."

SpareOne has a talk time of up to 10 hours and can keep its charge for 15 years if unused. Corporations can even bundle a package for employees with a free SpareOne cell phone with a smartphone. XPAL Power is selling the device with an Energizer AA battery and a microSIM for $49.99.

SpareOne isn't going to win any awards by being the most technologically advanced cell phone out there but as an emergency phone that runs on an AA battery, SpareOne will do the job. If you're ever stuck in a rugged environment, you would want to have a low-cost phone like SpareOne rather than a fancy iPhone.