HP97 battery pack rebuild

[Dieter]

(02-16-2016 04:11 PM)Jlouis Wrote:  It did not work with the ac charge pluged in (exausted battery pack on).

This might not have been a good idea.
Quote from the museum's battery section here and here:

"Warning! Most models can be damaged if run from the charger without good batteries installed. Only the manuals for the HP 35 and 45 models say that it's OK to run without batteries, but many collectors feel that even those should have batteries installed for maximum protection and long life."

You wouldn't be the first one to fry his calculator this way.

(02-16-2016 04:11 PM)Jlouis Wrote:  It was erratic, sometimes on, most of the time off.

Uh–oh...

Dieter