Not too long ago I purchased a Samsung Galaxy Tab A. I bought it mostly for browsing the internet and reading PDFs, but I've been using it a lot more for working in Emacs recently. With the help of Termux, I've gotten more or less a fully functional development and writing environment which has both a small physical size, and long battery life. With the use of a bluetooth keyboard, I have everything required to work, and comfortably at that.