All4Cellular offers the refurbished Mophie Juice Pack Pro Charging Case for iPhone 4 in Black, model no. 2120_JPPR-IP4-BLK, for $74.95. Coupon code "A4C10" cuts it to $67.45. With free shipping, that's $60 under the lowest total price we could find for a new unit. This 2,500mAh battery pack features up to 150% more usage time, resistance to shock, rain, vibration, sand, dust, and impact, belt clip, integrated screen protector, and more. Deal ends December 24.

Note: A 90-day All4Cellular warranty applies.