# Low battery warning
**URL:** https://community.homey.app/t/low-battery-warning/48063
**Category:** Questions & Help
**Created:** [June 2, 2021, 1:57pm UTC](https://community.homey.app/t/low-battery-warning/48063 "2021-06-02T13:57:31Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@K\_S](https://community.homey.app/u/K_S)
#### Post date: [June 2, 2021, 1:57pm UTC](https://community.homey.app/t/low-battery-warning/48063/1 "2021-06-02T13:57:32Z")
Hi
I have this flow to let me know when a device battery is low and might need changing:
It produces these kinds of results:
But, when I take the batteries out, (e.g. Popp radiator valve), they still have plenty of charge and indeed when I look at the insights for this device, it looks as though it was only drained to 67% not 3%:
What’s the most reliable way to monitor battery without flows for each device?
---
### Author:  [@Undertaker](https://community.homey.app/u/Undertaker)
#### Post date: [June 2, 2021, 2:26pm UTC](https://community.homey.app/t/low-battery-warning/48063/2 "2021-06-02T14:26:19Z")
Many devices do not report the battery level correctly. My flow looks just like yours. But I have created an additional flow that gives an additional warning when the battery level is 3 to 1%. Please also note that some devices only report their battery level to Homey once a day.
---
### Author:  [@Marcel\_Ubels](https://community.homey.app/u/Marcel_Ubels)
#### Post date: [June 2, 2021, 2:32pm UTC](https://community.homey.app/t/low-battery-warning/48063/3 "2021-06-02T14:32:07Z")
I get these messages a lot from Homey. This is not the flow i also have for the batteries.
Doesn’t make sense.
---
### Author:  [@K\_S](https://community.homey.app/u/K_S)
#### Post date: [June 2, 2021, 2:49pm UTC](https://community.homey.app/t/low-battery-warning/48063/4 "2021-06-02T14:49:02Z")
> [@Undertaker](#):
>
> Many devices do not report the battery level correctly. … Please also note that some devices only report their battery level to Homey once a day.
Sure, but why is the same device reporting 3% to the flow and 67% to “Insights” concurrently?
---
### Author:  [@Undertaker](https://community.homey.app/u/Undertaker)
#### Post date: [June 2, 2021, 2:55pm UTC](https://community.homey.app/t/low-battery-warning/48063/5 "2021-06-02T14:55:26Z")
I can not answer that. Perhaps there is a difference in how often Insights and the app are updated. Personally, I can’t tell the difference between Insights and my apps. However, I don’t use Popp devices. Contact the app developer if this problem only occurs with the Popp app.
---
### Author:  [@K\_S](https://community.homey.app/u/K_S)
#### Post date: [June 2, 2021, 3:01pm UTC](https://community.homey.app/t/low-battery-warning/48063/6 "2021-06-02T15:01:19Z")
So it was the Popp App that is notifying the flow? Not the Homey System?
---
### Author:  [@K\_S](https://community.homey.app/u/K_S)
#### Post date: [June 3, 2021, 11:52am UTC](https://community.homey.app/t/low-battery-warning/48063/7 "2021-06-03T11:52:44Z")
Hi @MarcoRuiter, The Athom support guy suggested as developer of the Popp app, perhaps you you can diagnose the big difference between what your app is reporting for the battery level and what the Homey system is reporting?
---
### Author:  [@K\_S](https://community.homey.app/u/K_S)
#### Post date: [June 17, 2021, 10:41am UTC](https://community.homey.app/t/low-battery-warning/48063/8 "2021-06-17T10:41:27Z")
Well, the developer Popp app developer (Marco) seems to be saying that the apps’ battery reading is from the “homey core”, so it appears both the 67% and 3% readings are from somewhere in the homey code. It disappointing and slightly worrying that such discrepancy exists.
>
>
> Hi,
>
> I have a homey flow to let me know when a device battery is low and might… need changing:
> !\[image\](https://user-images.githubusercontent.com/37977911/120662398-0645e000-c481-11eb-8430-2d90cecb116e.png)
>
> I often get a warning like this from the Popp Radiator:
> !\[image\](https://user-images.githubusercontent.com/37977911/120662493-1cec3700-c481-11eb-8f6d-7330380b0a20.png)
>
> ...but the Homey system shows a completely different value: 67% not 3%:
>
> !\[image\](https://user-images.githubusercontent.com/37977911/120662571-2aa1bc80-c481-11eb-9a5a-3739015a0ea7.png)
---
### Author:  [@DirkG](https://community.homey.app/u/DirkG)
#### Post date: [June 17, 2021, 12:33pm UTC](https://community.homey.app/t/low-battery-warning/48063/9 "2021-06-17T12:33:25Z")
It is frustrating that Athom itself sometimes does not know what data are coming from where and that they say: Please contact the App Developer.