Makers of a mobile phone that runs on a single AA battery say the phone is expected to keep its charge for 15 years.
The SpareOne has no camera, web browser or other hi-tech extras such as touchscreens. It’s designed simply to work as a phone and is built to last.
The phone is designed as a “backup” phone you can keep in the glove compartment for emergencies. The idea is that you can keep it there without worrying if it’s charged or not.
Many modern mobiles will lose their charge over time, even if switched off.
Its makers say SpareOne is ideal to leave in the car or pack in travel luggage, especially if you or your loved ones plan to go off the beaten track.
The SpareOne can be pre-programmed for instant access to phone numbers of key contacts, including the relevant emergency services in any location.
That single battery offers a talk time of up to 10 hours.
As consumers become increasingly reliant on their mobile phones, mobile-related backup measures will become more popular, so perhaps you can draw inspiration from SpareOne.