Today's smartphones give up the ghost after about a day or so. This case promises to give you extra juice by harnessing solar power.
That means you won't need to find a wall socket to recharge your phone. You won't even need a separate charger, as the charging tech is built right into the case itself.
The makers claim the photo voltaic cells are two to three times more efficient than the cells normally used in phone chargers. Though as ever, we'll reserve judgement until we've tested one for ourselves.
Because it's continually soaking up solar power, it should in theory keep your phone charged all day. Which would mean you never have to charge your device, as long as you don't keep it in your pocket too long.
If you're thinking a solar charger might not be such a great shout considering the UK's gloomy climate, then think again. Juse is designed to work under low light conditions. Because its cells are more efficient, they store power off even the most British of days. That's the claim anyway.
The chassis is made of polycarbonate, with an acrylic protective layer and high efficiency crystalline silicon. The nano battery is stored inside the case.
The cases start at $79 (£49), and are available for the Samsung Galaxy S5, Galaxy Note 4, iPhone 6, 6 Plus, and 5S. They come in black or white.
It's raised just over half of its $50,000 funding goal on Indiegogo, and still has 16 days to go.
Read more: The Pronto mobile charger promises to juice up in just five minutes