: This uses thermal technology (no ink required) to print full-sized A4 or Letter documents. It is much closer to the "pocket" size the ZUtA aimed for, though it requires specific thermal paper. It is highly rated on Amazon for its extreme portability and ease of use with smartphones.
: You may occasionally find units on resale sites like eBay, but be cautious as support and specialized ink cartridges for these units are extremely difficult to find. Best Portable Printer Alternatives zuta pocket printer buy online
: This is one of the smallest and lightest professional printers available. It charges via USB and is designed for professionals who need to print contracts or invoices from a briefcase. Epson's official site notes its built-in battery and 5.7-pound frame. : This uses thermal technology (no ink required)