AAA battery adaptor for HP Woodstock calculator battery pack HP 82019B & charging support

With these parts easy to print, you can rebuild an old HP82019B battery pack used on HP21, HP25, .. calculators of the Woodstock series, by using commonly available and cheap AAA NiMh batteries.
In addition you can print a charging support for easy connection of the battery pack to an external NiMh charger. This support can be fitted with standard 4 mm female banana plugs.