|It never fails to puzzle me that so many people who have laptops are cheapskates regarding replacing the main battery.|
This is your battery:
(part number) 371785-001 Battery (Primary) - 6-cell lithium-ion (Li-Ion), 11.1VDC, 4.4Ah, 48Wh
You don't necessarily need to buy a HP or Compaq battery.
If you know the part number, there plenty of cheaper clone batteries out there that are just as good. If they have a 1year warranty that's the same warranty you get for a HP or Compaq battery.
The only other thing that might cause the image you linked to and your other symptoms is the ram has a poor connection in it's slot(s).
A common thing that can happen with ram, even ram that worked fine previously, is the ram has, or has developed, a poor connection in it's slot(s).
This usually happens a long time after the ram was installed, but it can happen with new ram, or after moving the computer case from one place to another, and I've had even new modules that needed to have their contacts cleaned.
See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:
For a laptop, or netbook, you must remove both its main battery and AC adapter before you do that.
For a brand name computer, see the Owner's or User's manual if you need to - how to remove or replace the ram is usually in that - it may already be in your installed programs. If you can't get into Windows, it may be on a disk that came with the computer, or you can go online and look at it or download it - it's in the downloads for your specific model.
It came with XP SP2, so it was made in or after about 2003.
Apparently it came with two 256mb modules.
You would definitely benefit from more ram, if it's still got that.
Max is two 512mb modules - DDR266(mhz)