HeatSense Sensor Battery & Charging Guide

Battery Life

The HeatSense sensor battery lasts approximately 6 days in default mode. When standby mode is enabled, the battery life can extend up to 1 month, depending on usage habits and wear frequency.

Standby Mode

Standby mode is a power-saving feature available on firmware version 0.6.0 and newer.

• After 20 minutes of inactivity (i.e., not being worn), the sensor automatically enters a low power state.

• To wake the device, you can:

  • Shake it

  • Connect it to a charger

  • Press the reset button

Checking Battery Level

To check your sensor’s battery level:

• Shake the device and observe the LED indicator:

  • 3x short blink: Critical (<10%) — Less than 12 hours remaining

  • 1x longer blink: Low (10–25%) — More than 12 hours remaining

  • 2x longer blink: OK (25–50%) — More than 36 hours remaining

  • 3x longer blink: Full (>50%) — More than 72 hours remaining

Charging the Sensor

• Use the supplied magnetic charging cable.

• Connect it to a standard USB outlet.

• Charging takes approximately 2 hours.

Charging Indicators

• During charging: LED blinks once per second

• Fully charged: LED stops blinking

• Initial power connection: Device blinks rapidly 5 times

• If battery is completely empty: May take up to 30 seconds to start charging

Charging Precautions

• Charge only at ambient temperatures between 15–30°C

• Always unplug the charging cable when not in use

• Keep magnetic contacts away from metal items to prevent short circuits

• Ensure the charging cable pins and the sensor’s golden pins are clean and not damaged

• Recharge the device before it’s fully drained, whenever possible

• Note: Some portable USB power banks may not work due to the device’s low power draw