CST-01: world's thinnest watch with battery that lasts 15 YEARS

The world's thinnest watch - just 0.8mm thick - has been designed using a single piece of bendy stainless steel.

The CST-01 watch is thinner than a credit card and shows the time on an electronic ink display. This E ink design uses the same technology as the screen on the Kindle e-reader.

It has a 0.5mm flexible electronic component built-in and a Thinergy Micro-Energy Cell battery that can be charged in 10 minutes and has a lifetime of 15 years.

This micro energy cell can be recharged 10,000 times.

This battery's charge then lasts for a month before needing to be recharged.

The CST-01 is powered by an energy-efficient Seiko Epson System on a Chip (SoC).

To make the watch ultra-thin it doesn't have any knobs or buttons.

The CST watch is made by the Chicago-based firm Central Standard Timing, and is the brainchild of Dave Vondle.

To charge the built-in micro cell battery of the CST-01, as well as change the time from 12-hour to 24-hour format, owners must buy a separate base station, pictured. This costs £22 ($35) and can be plugged into a standard USB port. To plug it into the wall a Universal Wall Adapter must be bought for £10 ($15)