Assembled Battery-back port module repair kit for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators.

It is made of a flexible circuit, already collated to an 3D-printed battery-expansion ports module, ready for assembly within your HP41c. Standard colour of the base is black, but it can also be ordered in white (like the pictures)

Please be sure to eliminate rusting from the main board with Caig DeOxit (best), WD-40 (not as good) or other suitable cleaner, applied with cotton buds.