Originally Posted by
The EVOHOME Shop
Sorry for my delay in responding but I thought I would respond here instead.
From my tests here the batteries are NI-MH and when brand new they need to develop 'memory' before they will function properly - irrespective of what is written online. I have found that the best way to do this is as follows:
Put evohome Controller on the ATF800 charge stand, make sure the stand is powered (not switched off) and then remove the evohome fascia and part the batteries in the middle while it is on the stand (the plastic leg on the lid of a BIC pen is great for this). The battery symbol will go to the battery with a X (cross) through it. At this point unpart the batteries and you will notice the battery symbol change to a battery symbol with a lightning bolt through it. Leave the device charge until the battery symbol disappears (may take 3-4 hours to do this). Then remove the evohome Controller from the stand and allow the batteries to discharge (can take up to 6 hours) and then when you get the screen where it says 'put me back on the stand' do this and charge the batteries again.
You will find if you repeat this once every couple of months the batteries will last just fine (4-6 hours easy).
You may also find the plug you push in the back of the ATF800 is not pushed in fully! When you push the plug into the stand it will go in with a 'click'! Make sure this happens or it won't power the ATF800 correctly which will mean the batteries will not charge!
I hope that helps.