Groupon offers the uNu Aero Battery Case with Wireless Charging Pad for iPhone 5/5s in Black, model no. ARP-05-2000B, or White, model no. ARP-05-2000W, for $59.99 with free shipping. That's $10 under our mention from two weeks ago and the lowest total price we could find by $40. It features wireless charging technology, a 2,000mAh battery, and purports to add up to 10 hours of talk time to your iPhone.