Kensington has released its fair share of keyboard cases in the past, but KeyFolio Thin X3 for iPad Air ($100) is the first to feature a backup battery for an iPhone as well. Designed as an otherwise standard folio, with a shall for the tablet and the keyboard inside the front lid, the case is packing a 1650mAh battery that powers the keyboard and can juice up an iPhone at full 1-Amp speeds. To do this, a male Micro-USB to female USB adapter is included.…
