Poweradd Direct via Amazon offers the Poweradd Pilot E2 12,000mAh External USB Battery Pack in White or Black for $35.99. Coupon code "H7LMJ73B" drops it to $25.99. With free shipping, that's $44 off and the lowest total price we've seen for a 12,000mAh external battery pack this year. (We last saw a similar battery for $1 more two days ago, since expired.) Featuring dual USB ports, this battery comes with three connector tips and a micro USB cable.