Shortly after an Apple patent for a flexible battery design suitable for the rumored iWatch was published, German site MobileGeeks has shown off a real-life example of a fully-flexible, watchstrap-sized battery from Taiwanese company ProLogium.

Flexible Printed Circuits (FCP), where components are mounted on a bendable plastic substrate, have existed for several years, but until recently the batteries were the stumbling block. The patent shown by Apple still appeared to show rigid batteries mounted on an FCP. FCP Ceramic Lithium Batteries are the latest version of this technology, allowing the batteries themselves to be flexible. A quick video look after the break:

We’ve set the YouTube link to start at the smart-watch section, but you may want to rewind to the start to see what else flexible battery technology might offer.

The most recent reports appear to suggest a late-2014 launch for the iWatch, although a launch could happen as early as this Fall.