Romoss USA via Amazon offers its Romoss Solo 5 10,000mAh Dual-Port Portable Battery Pack in Black for $14.99. Coupon code "2BE4MUSH" cuts that to $9.39. Plus, Prime members bag free shipping. That's tied with our April mention, $30 off, and the best price we could find. It features four LED lights. Deal ends June 30.

Update: The price has risen slightly after coupon to $10.39.