HP-45 Battery/Power Problem

[Accutron]

I discovered the problem, and thankfully it wasn't the calculator. I checked the pack again under no load and it read about 2.75V. I checked it again with a different meter and got the same reading. The middle cell is completely dead (and passing current) and the other two cells are reading normal. I apparently just had a bad cell in the process of dying. The initial reading of 4.25V is what threw me off.