Classic (HP-67) charger / battery problem

[teenix]

It seems like the batteries are not charging.

The charger may not be able to charge the batteries or has limited current ability due to a fault.

The charger has two sections, one for powering the calculator while on charge, and the other section charges the batteries. Maybe the charger section is faulty, broken wire, loose plug.

Other problems may be internal calculator wiring and /or the charger socket, corrosion etc.

cheers

Tony