I bought an used TSU3000 on eBay last week. I received it today, and it worked OK, from what I could test (Display Okay, light worked etc.).
I noticed battery was low, so I plugged it in the Dock and let it charge. Then I went off a few hours.
After returning (About 3-4 hours after I had plugged it in) I then finished my .PCF file by hand-learning the IR codes of my remotes, of which I couldn't find any pre-sets here on the site, using Pronto Edit.
After that, I tried to upload it to the Pronto but it said "Battery to low to upload on device".
So I decided to let it charge a little further.
Then I tried it once again a few minutes ago from now (writing this posting) and it still said Battery to low.
So, I'm charging the pronto for about 10hours (with the said interuptions of learning I wrote above) and it is still "too low"?

Is this normal, and I have to wait a few more hours or is the battery pack weak/nearly dead?