# Which TRV has lowest battery drain?

**URL:** <https://community.homey.app/t/which-trv-has-lowest-battery-drain/55400>\
**Category:** Devices\
**Created:** [November 25, 2021, 1:12pm UTC](https://community.homey.app/t/which-trv-has-lowest-battery-drain/55400 "2021-11-25T13:12:13Z")\
**Posts on this page:** 3\
**Page:** 3

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**Author:** ![K\_S](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/k_s/32/11635_2.png) [@K\_S](https://community.homey.app/u/K_S)\
**Post date:** [March 29, 2022, 10:01am UTC](https://community.homey.app/t/which-trv-has-lowest-battery-drain/55400/41 "2022-03-29T10:01:02Z")

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So, after installing my tado equipment in January, I got my first email from tado saying I need to replace batteries in one of my radiators:

> _Dear Customer,_  
> _We wanted to let you know that the batteries in your **Smart Radiator Thermostat VA3474403072** in the room **Main Bedroom** are low. Your thermostat requires **two new alkaline AA batteries** (LR6). Don’t worry if you can’t change the batteries immediately. When your Smart Radiator Thermostat does not have enough charge to function, it will automatically close the radiator’s valve and the heating will remain off until you replace the batteries_.

**They made it less than 3 months**. I don’t think it’s a particularly challenging task for for this radiator - the tado receiver / dongle thing is in the next room, less than 4m away and the schedule is very straightforward:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/5/0/5058e9ccbf222c2ff97384be5571dc43e830e129.png)

So far, that’s even less battery endurance than Popp Z-Wave TRVs that I replaced

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**Author:** ![Henk\_Renting](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/henk_renting/32/87634_2.png) [@Henk\_Renting](https://community.homey.app/u/Henk_Renting)\
**Post date:** [March 29, 2022, 11:18am UTC](https://community.homey.app/t/which-trv-has-lowest-battery-drain/55400/42 "2022-03-29T11:18:53Z")

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I haven’t replaced the batteries in either one of my 7 Tado TRV’s yet and am using them for 1,5 year now.

The batteries you got with your Tado(‘s?) might just have been old, worn out because of heavy temperature changes, etc, etc… That happens more often with batteries of other devices too.

This is the first message for replacing that you are getting. Just replace them with good quality fresh batteries and you will probably see that they last much, much longer.

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**Author:** ![Adrian\_Rockall](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/adrian_rockall/32/13209_2.png) [@Adrian\_Rockall](https://community.homey.app/u/Adrian_Rockall)\
**Post date:** [March 29, 2022, 5:45pm UTC](https://community.homey.app/t/which-trv-has-lowest-battery-drain/55400/43 "2022-03-29T17:45:16Z")

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The batteries in mine last close to 2 years.

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