This afternoon, I was using a Dell Axim x51v, which was about the last of the PDAs.
WM has incredible Japanese handwriting recognition, and seamlessly works in a dual English-Japanese environment. So is a good electronic dictionary. I use Excel and PDF also but they load a bit slowly.
- x51v shipped with the buggy and slow WM5. Upgrade ROM to wm6.1 (A02 dynamite) which is the best I found in terms of speed, stability and features for my dictionaries (as of c. 2014 but you see 2021 development on XDA forums by lennysh those should be better).
- Pocket PC Techs offered to upgrade SMD ram from 64 to 128MB. I haven't seen one of these for sale in the used market since ~2010.
- The x51v was made around the introduction of some new SD and CF card standards; it's not entirely clear what standards the Axim fell under but it will run fast & big cards (not sure if at full speeds or full compliance lol). Confirmed to run: 256GB "Class 10" SDXC Cards from the SD slot + 128GB from the CF slot (not all cards will work).
- The battery cover switch fails (I removed and soldiered the connection)
- Batteries don't last too long lol
- Headphone out is mediocre. VLC is most updated media but still not a great experience.
XDA and Axim-Site were very helpful Windows Mobile forums. XDA still exists but the WM forums got buried in a reorg. Axim-Site was renamed mobilitysite; it is gone but we see an archived version with ROMs below
https://forum.xda-developers.com/t/dell-axim-wm6-x-x50v-x51v-x50-x51-sdhc-and-other-cards-support.328460/
https://web.archive.org/web/20081206104114/http://www.mobilitysite.com/boards/