This article is an excerpt from the Genius Hub Doctor, which is built into the App.
These instructions are provided so that the step-by-step information is available to users, but please note that these actions should generally be carried out whilst using the Doctor.
To access the Doctor, click here
Solution ID: 7506
Step 1
The batteries are low in the Wireless Radiator Valve and they will probably only last for another few weeks before the valve stops working altogether.
Remove the battery cover. Do this by pushing in the tab on the back of the device, and pulling the cover up. It may be helpful to push down on the top of the valve at the same time. The battery cover will slide up off the body of the valve.
Step 2
Remove the 2 x AA batteries, (note the orientation of the batteries, one is up and one is down).
Wait 30 seconds before putting in the new batteries. 
Step 3
Put in the 2 new AA batteries, take note of the orientation shown on the screen.
Rechargeable batteries should not be used as their voltage is too low (1.2v not 1.5v).
Step 4
Select the Genius Valve with the low battery
The Doctor will ask you to select the relevant device
Step 5
The Doctor will communicate with the device
Step 6
The Doctor will check that the device is configured correctly
Step 7
Replace the battery cover - align the clear plastic section of the battery cover with the screen on the valve, then push the battery cover down until it clicks into place.