Battery packs can be a must have accessory for some, especially if you have a device which either consumes a large amount of battery power or has a small battery that is inadequate for getting you through a full day's use. They're also great to carry around if you plan on being away from a power outlet source for longer than a few days as they can keep your smartphone, tablet, or other mobile device topped up during that time. The most useful battery packs generally carry a larger battery capacity, but these are usually a little expensive. Right now though you can currently pick up the Anker PowerCore 104000 battery pack on sale for $19.99, and if you use the coupon code B32MMKCP at checkout you can bring that price down to $15.99 and save a few more bucks.
The Anker PowerCore 10400 comes equipped with a 10,400mAh capacity, and has plenty of features like voltage boost which can detect the cable resistance to adjust and deliver the right amount of current, as well as PowerIQ which detects the charge protocol for a specific device so it charges as fast as it possibly can. It also carries multiple protection features, keeping your battery from short circuiting or overheating. This particular model of Anker battery pack is also compact in size making it extremely portable.