CTCStore offers the AceAbove Protek Air External 2,200mAh Battery Case for iPhone 5C in Yellow for $34.95. At final checkout, it drops to $14.50. With $4.50 for shipping, that's tied with our mention from two weeks ago for the same case in Pink and the lowest total price we could find. It features an earphone extension, charging switch, and LED battery life indicator. Deal ends November 23.