I have 4 X radiator valves. They all have the same rechargeable batteries in. One shows low battery after a short time eg 2 weeks.
Any solutions.
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Maybe you are using Ni-Mn rechargeablle batteries.
They are 1,2 V
You have to bye Lithium rech. batteries-1,5V
Are the batteries all definitely exactly the same (and from the same batch)? Even if they are the same brand, you can check if they are the same mAh (capacity).
If you’re finding only one of your valves is discharging quickly that may be the issue if it’s got a lower capacity battery in. Alternatively, check if that valve is on a radiator in a room which is having frequent temperature changes resulting in the valve adjusting the radiator very regularly.
If neither of those, or if they are all depleting quickly, I’d advise to check as remanuilov has said, and see what type of batteries they are.
On a personal note, out of curiosity, how long have you had the valves? Do you like them?
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Had them for over a year. Always work ok.
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I have 4 in use and they work great in the main apartment from one. The one issue I had was with the stat physically breaking at the attach point to the valve. This is such a a pity and make the stat unusable. The stat was outside warranty so that was annoying but does not detract from the overall benefits the stats are providing.