I just bought an office jet 100 HP printer which is compact and runs on its own lithium rechargeable battery and Am shocked I can't simply set it up to print when I am out away in my car. I was surprised it is not compatible with the iPad. I think I have to return it and googled portable printers and can't seem to find any printers (for using in the car with no 110 power, which are compatible with iPad. I searched and see that there are some apps let you print to any printer from an iPad, BUT it looks like you need to have a router or network or pc to go with it. My iPad has Internet thru verizon and can make its own mobile hotspot. I really don't understand this much, but looking for a a simple solution to print with only my iPad and a printer without ac current.