As one of its daily deals, All4Cellular offers the refurbished Mophie Juice Pack Plus for iPhone 4 and 4S in five colors (White pictured) for $19.99 plus $2 for shipping. That's $3 under our mention of a refurb from two weeks ago and $63 under the lowest total price we could find for a new unit today. This 2,000mAh battery pack provides up to an extra 8 hours of talk time in 3G or up to 16 hours in 2G. Deal ends today.

Note: A 90-day All4Cellular warranty applies.