HP-65 more on the card reader

[albertofenini]

Hi Tony,
I really don't know what to say,
It is a HP Classic battery pack, rebuilt with Nicd batteries that we have used for testing all the other calcs with no problems.
We have more than one pack and all generate this behavior.
The difference seem to be whether the batteries are inside the calc (original HP pack) or clamped to
the plus and minus contacts but outside of the calc.
The funny thing is that all of these components if taken one by one and combined in other units work fine,
but when put together they behave weird.
We'll go back to round oring and do more tests.
Thanks everyone for the continous support !