Hi!
I hade an old Telldus system that i upgraded to Homey. I have an Telldus weatherstation that operates with 433 MHz.
I have noticed that it drains a lot of battery… The summer was ok because the weatherstation also has a solarpanel. But now in the autumn the battery lasted a week!! Does anyone have a solution?
Or in worst case some other weatherstation that has following sensors, temperature, rain, wind and also has an indoor display?
Make sure you use good batteries. The manual of my weather station (Alecto WS-5500) suggested using AA lithium batteries, which are much more resilient to hot and cold temperatures than regular alkaline batteries. They also store more power (I installed my weather station about 18 months ago and haven’t yet had to replace batteries).
Thank´s! I will try that 
And it is not the Homey draining the batteries… 
As it is 433 MHZ it is oneway, so nothing is sent from the Homey to the sensors.
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I would not use lithium batteries in a unit that has a solar panel charging system.
I also have a Telldus weather station and used alkaline batteries in it for a few years which was fine. However, the temp/humidity sensor stopped reporting so I took the whole unit down from the roof to check. I found some corrosion and two PCB traces that was broken so I fixed that and put IKEA rechargeable batteries in it instead. It feels much better to have batteries that are ment to be charged in a unit that has a charging function.
(By the way…the corrosion was not due to leaking batteries. It was just poor sealing and cheap materials.)
And as Anders wrote above…Homey can never drain the batteries from a 433 MHz unit. 433 MHz units are not even aware Homey exists, or anything else for that matter, they are transmitting in the blind.
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What I know the weaterstations solar panel doesn´t charge the batteries. I will now buy a battery eliminator or what it´s called and connect it to an electical outlet
That is interesting! I have always assumed that there was a battery charging function in those units. (And we all know what they say about assumptions!) If this is not the case, I will second robertklep’s suggestion and I will replace my IKEA Ladda for lithium batteries!
I’m in a perfect situation to test this. My weather station has had the low battery warning for some time now and I have assumed (again) that it’s because the weather has been super gray for months here in Sweden. I can’t even remember when I saw the sun last. 
If the warning goes away when the sun returns I will know that my station have a charging function…if not, Paul_Thuswaldner’s information is correct.
I will report back when the sun has showed itself for a couple of days. 
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Promised report:
Now we have had a couple of days with sunshine. The battery warning is still present, so I think it’s safe to say that the solar panel is NOT charging the batteries.
When thinking about it that is 100% logical. Most people that buy a weather station like this will put alkaline batteries in it (I know I did for the first few years) and those should not be charged. That means that there is no real reason to use rechargeable batteries other than if you would like to recharge them now and then to save some money. However, many of these stations are placed in hard to reach places like roof tops so my opinion is that the best battery to use is the one that holds charge the longest and that is not rechargeable ones. So as soon as my roof is free from snow and safe to walk on I will replace the batteries for lithium AA’s.
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I think it also says so in the instructions that you shouldn’t have rechargeable batteries and that the solar cells don’t charge the batteries. But the weatherstation uses the solar cells when the sun is shining.
Instructions…what is that? Oh, you mean that pice of paper with text on it in the package that is thrown away immediately? 
