LumsingDirect via Amazon offers the Lumsing Harmonica Style 10,400mAh Portable Battery Pack in Champagne Gold for $18.99. Coupon code "RHJEEEQH" drops it to $9.49. Plus, Prime members bag free shipping. That's tied with our mention from a month ago, $33 off list, and the lowest total price we could find. It features two USB ports and a battery level indicator. Deal ends May 14.