Early Google Glass owners have been singing the praises of the wearable augmented reality visor as if it were the greatest thing since sliced bread. And it may well be, but it's not without one big fault - battery life. Making it through a full day with Glass just isn't a possibility but one inventor believes he has come up with a solution to the problem.

Designer and inventor Kevin Alan Tussy's idea is called PWRGlass, an external battery pack that works as an add-on accessory to Google's futuristic eyewear. After using Glass for just one day, Tussy said he saw a need and the solution as soon as the battery died prematurely. Not wanting to waste any time, he came up with the design and had it in his patent attorney's hand that same night.

PWRGlass is currently just a 3D rendering at the moment although Tussy says a 2,000mAh lithium-ion battery will be hidden under what looks like a sunglasses band. If you spend any time around college-aged frat guys, you know that such a thing is actually rather popular. What's more, you'll be able recharge the battery pack and Glass at the same time using a single USB cable.

The designer is also reportedly working on a second device that will add additional storage capacity to Glass, which is currently limited to just 12GB of internal storage.

At present, it's little more than a concept that's pending patent approval but I have a feeling we will be seeing a lot of peripherals surface as the launch date for Glass approaches.