My Calculator Collection - preparing them for sale

[Steve Simpkin]

If you still have the Woodstock battery packs they are very easy to rebuild. Just use a razor knife to cut through the thin plastic bar between the batteries on the end closest to the battery opening on the pack. You can then push it aside gently and pull the batteries out one at a time. You can buy new flat top AA NiCad batteries, charge them with an external charger and slip them into the pack. Be sure to observe the correct polarity as shown in the following picture.
https://www.hpmuseum.org/batts/batt20.jpg

The Spice battery packs are just as easy to rebuild. Simply remove the clip around the batteries and replace them with new flat top NiCads that you charged with an external charger. See the Spice section of the following link for battery polarity and more information. It also has rebuilding information for other model HP calculators.
https://www.keesvandersanden.nl/calculat...teries.php