Once you have the correct , here are the most important sections to read first:

" is a common model number used by several different brands! (like a drone, watch, or RC car)?

The 2021 edition adds warnings about for battery-powered ZY8068 units. It specifies a cutoff voltage of 2.8V per cell (changed from 2.5V in 2020).

Allows for calibration based on wheel diameter or pulse input.