HP offers its HP Power Pack Plus 12,000mAh Portable Battery Pack, model no. M6H76AA#ABC, for $64.99. Coupon code "LIBERTY16" cuts it to $59.99. With free shipping, that's $44 under last December's mention and the lowest total price we've seen. (It's the best deal now by $40.) It features integrated cable storage and can charge two devices at the same time.