Lepow's U-Stone 12000mAh Power Bank ($120) is one of the more elegant-looking large capacity battery packs we've seen recently. The large, stone-shaped pack holds enough juice to power up an iPad almost all the way, but it oddly does so at 1.8-Amp peak speeds. Included with the battery is a USB to micro-USB cable that can be stored on the one open end, with its plugs fitting into the matching ports. To check the battery levels, you're supposed to…
