ThinkJet 2225BK error light flashes twice on power on

[institches]

Thanks for the reply Dave.

I gave it a good charge prior to seeing the amber light issue and measured the voltage at around 4.8V so I assumed the battery pack had four cells @1.2V. It seemed to hold this charge okay.
I see now, after opening the pack, it has 6 cells so should be 7.2V. The batteries are looking a little worse for wear too. I should replace those but in the meantime, I guess it's safe enough to run the printer from a bench power supply?
The last lot of batteries I bought were fairly low quality and did not last long. I had trouble tracking down tabbed cells so had to quickly solder on to the terminals directly which may have damaged the cells.

I wasn't aware of the cartridges being available still. We don't have a Staples here but I'll have a search around on that part number.

Cheers,
Gary