Quantity   Component name
2 × Battery pack latches salvaged from the original battery pack
2 × Battery pack latch springs salvaged from the original battery pack
2 × M2 screw, 10mm
3 × Battery pack contacts and wire salvaged from the original battery pack
5 × Shrink tubing 1cm (optional) For making and insulating electrical connections
1 × 16mm M3 Cap Bolt 16mm measures the length of the threaded part. The cap should be 5.4mm dia by 2.8mm long.
4 × 20mm M3 Cap Bolt Available online e.g. through amazon as a small box of assorted M3 cap nuts and bolts.
5 × M3 Nut
1 × 4x AA batteries
3 × Spring strips, 30mm each Substitute with any preferred/available battery interfacing methods. I got mine from an old retracting keycard lanyard.
2 × 26.5mm length each of common household "mains" wire, stripped, solid core copper, diameter of 1/16" aka 1.58mm aka 14awg