Pls donwload from: https://download.toolkitrc.com/m6d/
Tip: There are 2 ways can check your charger’s firmware belong to version V1 OR V3:

1. When charger power on, the firmware version will display on lower right corner for 3 seconds.
2. Long press the “scroll wheel” enter into setup page, and then go to the last line, here can find ID and firmware version.
   ===M6D V3.15===2025.02.22===
3. Fixed the problem that some internal resistance values are not refreshed during the internal resistance test.
4. Fix the error of the current selection list name and icon in smart battery mode.
5. Added a dynamic red letter prompt that is not connected to the balance port.
6. Modified the position of the cursor when the charging stop is made to achieve a fast stop.
7. Added the sleep energy saving mode can be set, you can set the time to turn off and modify the sleep.
8. Fixed the bug that the recycling mode appeared in adapter mode.
9. Fixed the crash issue under Russian language.
10. Fixed the problem that the cursor may be lost when the channel selection state is in place.
11. Fixed the issue that the default state was restored but the brightness and sound were not refreshed.