It's only available used, but have a look at the Alphasmart Neo 2.

I'll quote a description from another thread.

https://www.reddit.com/r/typewriters/comments/ba7aq5/any_digital_typewriters_like_the_freewrite_that/

> [...] > > These things are dirt-cheap, usually $30 or less. They were built to use in schools and the like years ago, and most of them barely saw any use at all as laptops came out and took over their role. There are a ton of them coming up for sale on eBay that are as close to brand new as they could possibly be. They save files internally, and you can output them to your desktop computer by plugging it in and hitting the send button (it'll emulate a keyboard and type the document straight into something on your computer). There's also a program that can directly import the files, but I'm not sure if that program still works (haven't used it in years - send works). > > You put a pair of regular old batteries in this thing and it'll run -forever-. They last literally months on a single set of batteries. I'm not joking. You can type on this thing for something like 700 -HOURS- on a single set of double a batteries. There's nothing like it on the market. > > The keyboard is a joy to type on, and the device is so sturdy you could probably use it as a boat paddle and still type something for the next month when you finished rowing to your desert island. :) > > It's a device that has a decent following among authors. I know several authors who covet their Neo, myself included. :) > > There is also an alpha smart Dana with a larger screen that is similarly cheap (it's a newer version of the alphasmart), but it's not as legendarily reliable as the Neo 2 and eats batteries in just a few hours. It also doesn't save EVERY keystroke like the Neo does... and the old palm software it used for its word processor is basically unsupported/unusable these days, so if you use a Dana you -will- eventually lose some work. DONT BUY THE DANA. > > I'd also avoid the Alphasmart 3000. Those things are older devices and just don't have the storage the newer Neo and Neo 2 have. A Neo or Neo 2 are substantially better machines. > > Here's a website that compares the Alphasmarts... > > https://nowastedink.com/2015/10/09/comparing-3-alphasmart-digital-typewriters/ > > [...] > > Alphasmart has arrow keys. You don't have to edit as you type, but you have the option. > > Trust me, get an alpha smart. If you want a dirt cheap -typing- machine, there is nothing on the market that does it better. > > I bang out words for a living, and I've typed over a million words into my alpha smart Neo. It's not the device I -always- reach for (I sometimes grab my MacBook pro because I need something a little more full-featured), but when I just want to knock some words out without any distractions, the alpha smart is the machine I use. > > I have no complaints. I think I bought mine for fifteen bucks and it's paid for itself tens of thousands of times over ;). > > [...]