# Battery care

A server phone stays plugged in all day. Sitting at 100% wears the battery out and can make it swell, so cap charging at 80%.

## Turn on the 80% limit

Most phones can stop charging at 80%, but each brand hides it somewhere else. Samsung calls it **Protect battery** and Pixel calls it **Charging optimization**.

1.  In Dukoi, open **Settings → Battery care**.
2.  Tap **Turn on**. It opens your phone’s battery settings.
3.  Turn on the charge limit there. Apps can’t change it for you.

## What Dukoi watches

-   Charge, temperature and battery health right now.
-   Whether a limit is on. Android won’t say, so Dukoi looks: plugged in and resting at 90% or below means on. If it can’t tell yet, it says **Not sure**.
-   The last 7 days: hours a day at 100%, and the hottest it got.

Dukoi checks the battery every 10 minutes. The readings stay on the phone.

> Running hot?
> 
> Heat ages a battery faster than anything. Keep the phone out of its case and somewhere with air around it, and use a good charger.