Mesa 4 Thermal Management | Support | Juniper Systems

How the Mesa 4 Manages Temperature and Charging

Mesa 4 units running Embedded Controller 1.07 or later include updates to the device thermal management system, designed to protect the battery and internal hardware when the system becomes too hot or cold.

For optimal charging performance, avoid running resource‑intensive applications or processes while charging your Mesa 4 or in places with high ambient temperature.

Too cold to charge

Move the device to a warmer environment and allow it to warm up.

Too hot to charge

Reduce system activity to allow the device to cool down. Charging will automatically resume once the temperature drops to a safe temperature.

You can help lower the temperature by:

Putting the device into Sleep mode: Windows Start Menu > Power options > Sleep
Shutting down the Mesa 4 completely: Windows Start Menu > Power options > Shut down

What causes high system temperature?

The most likely cause of high internal temperature is heavy system activity, such as running resource‑intensive applications or Windows updates. Battery charging and high ambient temperature also raise internal temperature.

Safe Operating Temperature Thresholds

If your Mesa 4 exceeds its safe operating temperature, the system displays warnings and may slow down or stop battery charging. If the temperature reaches 156 °F (69 °C), the device will enter hibernation mode to protect the battery and internal components. The table below explains each warning message and how the device responds.

Internal System and Battery Temperature Warnings

Battery Temperature	Warning Message(s) Displayed	Device Behavior
-20.2 °F to 32 °F (29°C to 0 °C)	Too cold to charge.	Charging is stopped until the battery returns to a safe charging temperature. Battery status warning message is displayed in Device Settings.
113 °F (45 °C)	Too hot to charge.	Charging rate is reduced to limit further heating. Battery status warning message is displayed in Device Settings.
122 °F (50 °C)	Too hot to charge.	Battery charging stops. Battery status warning message is displayed in Device Settings.
149 °F (65 °C)	The internal temperature of your device is too extreme.	System warning is displayed.
154 °F (68 °C)	Warning! Keep the charger connected or shut down the device. There is not enough battery power available. The internal temperature of your device is too extreme. Your device will hibernate soon.	The device prepares to enter hibernation mode by disconnecting the battery from the system. System warnings display in succession.
156 °F (69 °C)	No message is displayed.	Device enters hibernation mode to protect hardware.