The Fujitsu ScanSnap S1300 mobile scanner is not nearly as lightweight nor as portable as other mobile scanners, but don’t let that deter you. It is still considerably smaller than sheetfed or flatbed scanners, and the ability to power from USB ports make it a feasible portable option. Its duplex-scanning mode and instant-PDF feature as well as included software bundle (with quality OCR software) make it a perfect and extremely fast scanner for all kinds of document scanning. If you do not require TWAIN/ISIS support in your scanner, then this could be an ideal choice for all of your document-scanning needs.