New Never Used HP41CV ?

[Raymond Del Tondo]

I think there is even a separate article about the HP Battery Shield.
It serves some purposes:
- Holding batteries in place when not in the calc.
Often the retainer clips in the battery holder don't hold the batteries back from falling out,
so the Shield will help there.

- From HP: Protect the sensible contact foil from battery leakage.
One of the contacts of your Shield has signs of battery acid, so yes, this workd to some extent.
But at a later point, when leakage got more intensive, the contact foil will be reached by the acid.

- Providing better contact between the battery terminals and the contact foil in the calc.
Unfortunately it's done by damaging the contact foil.
The back side of the metal buttons of the Battery Shield has sharp edges,
which will press into the contact foil, with high potential for cutting into the foil.

Normally, without the Battery Shield, when inserting or removing the battery holder from the calc,
the movement describes a curve around the angle point, so the battery contacts "roll" over the tip of the contact foil, usually not deforming the foil.

The HP Battery Shield was provided with new HP-41 units for a relatively short period.
After all, the Shield has more disadvantages than advantages.