We have mobile working operatives who need to connect a portable printer to a laptop and be able to print off A4 documents.
The operatives visit housing properties which do not have an electricity supply.
Therefore they need to have a printer which is powered directly from a laptop via USB or powered by a battery.
I came up with the idea of using thermal technology as these printers may be sitting on the carpet / seats of a car and Ink tends to dry out. Laser would be another good option but I guess powerwise it would not work.
I have found this printer which is almost perfect:
But i expect the paper costs to be too high and the 20 page limit is too little
Any feedback would be appreciated