As smartphone and tablet technology advances by leaps and bounds every year, battery technology unfortunately progresses at a much different pace. Even powerful phones like the Lumia 1520 will run out of power before long if you do much gaming and movie watching on them. Wall and car chargers can only help so much, as we often use mobile devices away from those life-sustaining outlets.
The solution for consumers, of course, is to grab an external battery (aka power bank). Lumsing (makers of the excellent Ultrathin Bluetooth keyboard) offers several different power banks to choose from. The Lumsing 10,400 mAh Harmonica Power Bank is one of their more robust options, with enough power to charge a tablet like the Dell Venue 8 Pro twice over. It's also shockingly affordable at only $19.99 on Amazon. Let's take a closer look at the big little power bank.