eCase via Amazon offers the Kmashi 10,000mAh Dual-USB External Battery Pack in Black, model no. 6.95557E+12, for $13.99. Coupon code "UOFBXBF3" cuts that to $9.20. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.52.) That's tied with our May mention and the lowest total price we could find now by $7. This battery includes two USB ports and is capable of charging models such as the iPhone 6, 6 Plus, iPad, and Samsung Galaxy. Deal ends September 30.