The discharge cutoff voltage can be adjusted among 11 levels: 2.5V, 2.6V, 2.7V, 2.8V, 2.9V, 3.0V, 3.1V, 3.2V, 3.3V, 3.4V, and 3.5V. The maximum discharge current is approximately 1A and cannot be adjusted or modified independently. The charging voltage is controlled by a dedicated battery charging chip, with a maximum charging current of approximately 1A and a full charge voltage of 4.2V. The device only saves the set parameters and does not save measurement data during power loss.

To measure the internal resistance:
After installing the battery, wait for a few seconds for the battery data to be read. The battery voltage and internal resistance parameters will then be displayed. Please note that there may be a delay in loading data during the battery installation or removal process. Wait for the data to stabilize before checking.

To adjust settings:
1. Press the "Menu/M" button to switch between menu options.
2. Press the "Adjust/S" button to switch between different working modes.
3. Press the "Start/Stop/R/S" button to start or pause the program operation.
4. Press the "Channel/CHN" button to switch channels and view or set channel parameters.