Mingjie Li| Quantity | Component name | |
| 1 | × | LCR-T4 Transistor Tester |
| 1 | × | Boost Converter Module MT3608, TPS63070, or any other 9V module |
| 1 | × | TP4056 Lithium Charger Module Recommended with protection circuit |
| 1 | × | Lithium Battery |
LCR-T4 Transistor Tester Lithium Battery Mod
A modification for the LCR-T4 transistor tester that replaces the 9V battery with a lithium cell and preserves the power-saving circuit