Oneus is hitting the one year mark, to celebrate it’s selling a cheap, portable battery pack that can replenish your device three times before needing a recharge.

The 10,000 mAh Oneus wer Bank is $15, listed as “coming soon” on the Oneus site.  It can charge two devices simultaneously is available in Sstone Black or Silk ite. The company is also giving ten lucky users one of its new power bricks.

To keep the party going, Oneus is continuing to sell its phone without its frustrating invite system, offering 11 percent off accessories (one plus one, get it?). Additionally, Oneus is running a contest for what to call its next custom ROM. 

The birthday announcement includes a video from CEO te u, who reflects on the highs lows (there were plenty) in the company’s first year.

The story behind the story: Oneus had a pretty decent first year, but suffered too many missteps if it wants to be taken seriously as a key Android device partner. Its phone was pretty well received (including in our review), but there were many crippling bugs, late updates, a disastrous selfie campaign that would make many think twice about throwing down cash for a Oneus One—if it wasn’t so darn competitively priced.