SpareOne hands-on: the phone that runs on a single AA battery, holds a charge for 'up to 15 years'
It's not recommended for a primary phone and as it has no LED backlight whatsoever, no contact list, can't check your email. However, SpareOne phone is a good idea for your Bug Out Bag or your car glove box, or in a safe location in your house. It runs on a single AA battery, can provide up to 10 hours of talk time, and the packaging says that it holds a charge for 15 years. Spare batteries are still recommended. Just in case.