Veego via Amazon offers its Unifun 10,000mAh Portable Battery Pack, model no. U827, for $19.99. Coupon code "4TJRJW3T" drops it to $12.99. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.67.) That's $37 off list and the lowest total price we could find. It features two USB ports and can purportedly be fully charged in two hours. Deal ends October 30.