OnePlus promised us an announcement for December 17, and just as we had predicted, it was for an official OnePlus Power Bank. Packing 10,000mAh of power and two USB outputs, this pocket-sized device has enough juice to charge your One — and other mobile devices — up to three times before it needs recharging. And it’s super affordable, too.

“Every inch of the OnePlus Power Bank was designed with you in mind,” OnePlus says. “Sleek lines, gentle curves, and an emphasis on minimalism create the ideal companion for your OnePlus One.”

The Power Bank will be available in Silk White and Sandstone Black just like the One itself, and it’s lightweight at just 220 grams. You can plug almost any device into one of its two 5-volt, 2-amp USB ports for charging, so that you never have to worry about your beloved gadgets giving up on your while you’re on the go.

The Power Bank uses lithium-polymer battery technology, and boasts protection from overcharging, overheating, electrostatic, and more. You’ll be able to buy yours early next year, and it’ll be priced at just $14.99 in the U.S., and €15.99 in Europe.

• SourceOnePlus