Quantity   Component name
2 × Battery Contacts MPN 5225, Keystone Electronics
2 × LR41 Button Cell Batteries
1 × Red Through Hole LED MPN WP7113ID, Kingbright
1 × Stranded Wire MPN 2513, Adafruit Industries LLC
1 × Slide Switch SPDT Through Hole MPN OS102011MS2QN1, C&K
1 × Heatshrink Tubing 1/16" X 4' FP301-1/16-48"-GREEN-250 PCS, 3M