General description Simple operation allows for a one-step charging process. The charger features a voltage display function, eliminating the need for an external adapter and enabling detection at any time. It boasts ultra-high charging accuracy with an error margin of ± 10 mV and includes multiple protection functions to ensure the safety of both batteries and users. Additionally, it has an automatic repair function for old batteries. Technical specifications Color: Blue Material: Metal Charging voltage range: 9V-16V Adapter power requirement: ≥30 W Measurement allowed error: ± 1-3 cm Usage Insert the adapter to power the charger; it will emit a sound and display on the screen. Insert the battery; the charger will beep twice and start charging. The display cycles through showing the total battery voltage and the voltage of each cell. Once charging is complete, the charger will automatically stop, the screen will flash, and the buzzer will sound every 5 seconds. For voltage display,