WundaSmart User Guide

A Support Hub for all things Wunda Smart, from our Resource Library to our FAQs and more!

Battery replacement in the Square Radiator Head

Batteries Required: 2 x AA alkaline batteries (LR6)

It is forbidden to recharge exhausted non rechargeable batteries!

Typical Lifespan: 10 - 24 months (depending on usage)

To check the battery status, navigate to Room -> Settings.

wunda click settings

Look for the tab labeled "Radio Device Settings" where you will find an icon displaying the battery condition.

Wunda Home battery level

wunda battery level screen

If a battery replacement is required, you will receive an alert. The alert icon will appear at the top right corner, and clicking on it will display information about the specific device and location where the issue was identified.

If you have multiple Radiator Heads in the room and wish to distinguish between them, access Settings -> Room Devices. Select Identify Device and proceed through the provided steps.


When changing the batteries, keep in mind the following guidelines:

  • Use only the specified battery type for your device model.
  • Avoid mixing different battery types.
  • Do not combine old and new batteries.
  • Replace all batteries simultaneously.
  • Ensure proper alignment of the positive (+) and negative (-) battery polarities with the corresponding symbols in the battery compartment.

When replacing batteries, be sure to dispose of used components properly. The battery must be removed from the control before it is scrapped. If a battery pack has leaking fluids, do not touch any fluids. Do not use a damaged battery. 

Battery replacement process:

If necessary, you can detach the Radiator Head with Buttons before replacing the batteries. Refer to the Mounting guide for instructions on how to dismount the Radiator Head with Buttons.

  1. Remove the battery cover from the Smart Radiator Head by pressing the latch with the nail or tool (eg. coin, screwdriver)

  1. Insert the two AA batteries as indicated

  1. Put and close battery cover
  2. The battery icon in the application will be updated within 2 to 6 minutes.