At first blush, the thought of a fully portable printer, designed to run on battery power, may seem absurd: Carry your Canon? Haul your HP? Truth is, only a few current portable printers are the kind of all-purpose printing tool that your typical desktop printer is. But printers have seen some serious specialization, and you can find a wealth of portable ones that instead do a single thing well. PCMag has been testing printers for four decades, and I've been in the thick of it for most of that time as resident printer expert. Our best portable printer for general use is the HP OfficeJet 250, but the additional models below can work for those specialized uses. Read on for more labs-tested