Quantity   Component name
1 × TP4056 Type-c USB 5V 1A 18650 Lithium Battery Charger Module Or anything that can charge a single 18650 lithium cell
1 × Alligator clamps Get fairly small ones to clamp on the different welded battery leads in the pack
1 × Multimeter If you are on this site, you likely have one of these
1 × T10 Safety/Security Torx
1 × T9 Safety/security Torx Only needed for the 12Ah M18 battery pack