Photo Video 4 Less via eBay offers the Mophie Juice Pack Air 1,700mAh Charging Case for iPhone 5 / 5s in Black, Red, or White for $19.95 with free shipping. That's tied with last with last week's mention as the lowest total price we've seen for this case. (It's the lowest price we could find now by $20.) This 1,700mAh battery pack provides up to 10 hours of talk time or up to eight hours on the Internet.