UNUCase via Amazon offers its UNU Superpak 10,000mAh External Battery Pack in Black or White for $39.99. Coupon code "APXFWFRH" cuts it to $22.99. With free shipping, that's $11 below our expired mention from two days ago and the lowest total price we've seen. (It's a current low by $14.) It features a 2-in-1 Apple-certified lightning and microUSB cable and dual USB ports.