A dealmac exclusive! Tanga offers the Voltix 6,000mAh Dual USB External Power Bank for $17.99. Coupon code "DEALNEWS" cuts it to $16.99. With $3.99 for shipping, that's $7 under the lowest total price we could find for a comparable dual USB external power bank, even without the adapters. It features dual USB ports for simultaneously charging two devices, integrated micro USB charging cable, overload protection, over-voltage protection, overheat protection, 4-LED charging indicator, and four adapters including a 30-pin, micro USB, mini USB, and Nokia adapter.