In the past I've just emailed invoices to customers and on the odd occasion printed them out with an available printer in their home as a test page when setting it up. But I want something mobile.
For example, when I go back to my car, I want to be able to hook up a tablet or ultrabook and print to a 12V printer that I can hook in to the car's accessory power.
I've looked at the Brother PocketJet 600, but it's $600.00 (USD) which is a little out of my price bracket and there are complaints about incomplete packaging and such due to poor information being "body only". Don't really want to risk that one.
What do other people do? I feel weird using customer's printers, haha.
Cheers,
David