Ebay offers Anker MagGo Power Bank 5000mAh 15W Qi2-Certified Slim Charger for iPhone|Refurb for $28.77 (reg. $49.99) after code with free shipping. 

Apply Code: TECHREFURB20

Product Description:
Experience seamless fast charging with Anker MagGo Power Bank, perfect for charging your iPhone on the go. At just 0.34 inches thick, this power bank slips easily into any space. It has a special finish for enhanced grip and comfort. Equipped with up to 15W of Qi2-certified wireless output, the power bank keeps you charged no matter where your adventures lead.