New mobile phone ditches the extras but has a battery life of 15 years

Designed as a back-up phone you can carry without worrying if it's charged or not, the AA-powered SpareOne is ideal to leave in the car for emergencies - and it has a built-in torch.

Source:
http://www.dailymail.co.uk/sciencetech/article-2084582/New-mobile-phone-ditches-extras--battery-life-15-years.html