This KiwiChoice Portable 2000mAh Battery Pack drops from the list price of $49.99 to $17.99 to $12.99 using the two-day code VMEBTS and checking out through V.me by Visa at BuyDig. Plus, the shipping is free making this the best price we could find on this pocket-sized battery pack by $20. You can charge this pack using the solar panel array or with the included USB, wall or car charger. It stores enough power to fully recharge an iPhone 5, 1.5 times. There is no sales tax (except NJ).