I've recently found and pulled out my family's old HP Ipaq h1900 to see if it still works. Needless to say... it doesn't.
The charging cable is slightly damaged, but it goes in the PDA without too much of a problem, so I decided to buy a replacement USB cable and battery just in case.
The cable arrived first. I tried that. Didn't do anything. The unit didn't turn on. So I tried the battery. It still doesn't work. I'm stumped; if it's not the battery, or the cable, what is it?