The CoreS3 (SKU: K128) and CoreS3-SE (SKU: K128-SE) use AXP2101 power management chips and are designed with low power consumption. However, to further reduce power consumption while maintaining full functionality, you can consider the following aspects:

Power Supply Configuration: You can configure the XPD_SDIO_REG to select the power supply from the regulator or an external power source.
Voltage Selection: Configure SDIO_TIEH to select a 3.3V or 1.8V voltage.
Under - voltage Detection: The CoreS3's ESP32 - S3 chip has an under - voltage detector that can detect the voltage of some pins. When the voltage drops rapidly below a preset threshold (default is 2.7V), it can turn off some power - consuming modules to save power.

In addition, the power consumption of a device is also affected by factors such as the brightness of the screen, the operation mode of the Wi - Fi module, and the working state of other components. You can try to adjust these factors to reduce the power consumption of the CoreS3.

(The above content is generated from https://chat.m5stack.com/)