Update (9/15 8:45): BuyDig via eBay is offering the below Mophie battery case for $42.99 shipped.
BuyDig offers the Mophie Juice Pack Helium 1500mAh iPhone 5/5s battery case in metallic for $44.99 with free shipping. The discounted price will be shown once you proceed to checkout. That’s $35 below retail and the best price we’ve seen since July when it was just $5 less.
The Juice Pack Helium arms your iPhone with up to 80% more battery life in an ultra-thin design. Use the included micro USB cord to charge your iPhone and the Mophie battery at the same time. It’s made from a durable polycarbonate to protect your iPhone from bumps and falls.