<![CDATA[Core2 power use versus CoreS3 power use.]]>I noticed that for my application(a Geiger counter) a Core2 uses 120mA from 5volt and drains a 2000mA battery in about 16 hours, But when I use the CoreS3 it uses 250mA from 5volt and drains a 2000mA/h battery down in 8 hours.

I prefer to use the CoreS3 (much better screen responses) and I can order them as CoreS3-SE (no back). But the double amount of the current drain of the CoreS3 is not acceptable for my clients.

Is there a way to reduce the current drain while keeping the CoreS3 fully functional?

Regards
Rob Oudendijk

For more information about the project, https://bgeigiezen.safecast.jp

]]>https://community.m5stack.com/topic/7581/core2-power-use-versus-cores3-power-useRSS for NodeSun, 08 Mar 2026 17:33:42 GMTThu, 29 May 2025 00:36:46 GMT60<![CDATA[Reply to Core2 power use versus CoreS3 power use. on Fri, 30 May 2025 16:06:19 GMT]]>Hello @robouden

hmm, running UIFlow2 on my M5CoreS3 and measuring current on USB-C I get about 140 mA / 5 V.

Is your M5CoreS3 maybe charging the battery?

Thanks
Felix

]]>https://community.m5stack.com/post/29136https://community.m5stack.com/post/29136Fri, 30 May 2025 16:06:19 GMT<![CDATA[Reply to Core2 power use versus CoreS3 power use. on Thu, 29 May 2025 02:54:00 GMT]]>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/)

]]>https://community.m5stack.com/post/29122https://community.m5stack.com/post/29122Thu, 29 May 2025 02:54:00 GMT