Recently came across an HP 29C that has a separate charger module. The batteries are in the charger, underneath the tan plastic cover. I can't seem to be able to remove this cover to get the batteries out, to be able to place them into the calculator. There is an indented arrow on one end and when I attempt to gently pry it up, it does not move. It does not slide either. I don't know if it's stuck or what, but I don't want to damage it.
Any ideas?