# \[APP\] Aqara & Xiaomi Smart Home - Simplify your life with a smarter home

**URL:** <https://community.homey.app/t/app-aqara-xiaomi-smart-home-simplify-your-life-with-a-smarter-home/156>\
**Category:** Apps\
**Tags:** app, zigbee\
**Created:** [August 22, 2018, 8:18pm UTC](https://community.homey.app/t/app-aqara-xiaomi-smart-home-simplify-your-life-with-a-smarter-home/156 "2018-08-22T20:18:09Z")\
**Posts on this page:** 1\
**Showing post:** 446

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**Author:** ![TedTolboom](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/tedtolboom/32/12081_2.png) [@TedTolboom](https://community.homey.app/u/TedTolboom)\
**Post date:** [January 28, 2019, 8:02pm UTC](https://community.homey.app/t/app-aqara-xiaomi-smart-home-simplify-your-life-with-a-smarter-home/156/446 "2019-01-28T20:02:13Z")

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> [@Bart](#):
>
> The sensors which have reported, are all stating 100% battery level. Do I need to do anything for the level to become realistic?

> [@wesley\_w](#):
>
> Same question… all sensors are 100% at the moment.

I’d say, you didn’t use them as you should have. So use them more! 🤣

But to put it in perspective: of all the devices I have been using since the start of the development of this app (mid 2017), non have ended up with an empty battery yet. My 2 temperature sensors, continuously reporting over 1.5 years, show a level of 73% and 87% and those are the lowest among my devices.

Perhaps good to explain the way the battery value is determined (as also used by several other home automation controllers):

> As part of the lifeline report (0xFF01), the Xiaomi / Aqara device also sends the actual voltage of the battery.
> 
> The battery percentage is determined based on the reported voltage, as:  
> `Battery value (percentage) = (reportedVolts - minVolts) / (maxVolts - minVolts) * 100`  
> `with maxVolts = 3.0 (V) and minVolts = 2.5 (V)`

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