Quote:Battery life differs greatly when you compare different mobile devices running Android. From devices that drain battery quickly to devices that seemingly can run for days without recharging.

Many factors play a role when it comes to battery life: there is the battery itself, the device's hardware and screen, settings such as the display brightness, and also applications that run on the device in the background.

Tip: applications like Battery Aid may help improve battery on Android devices.

What the device does or does not do when connected to a wireless network may play a role as well. Some Android devices are configured to keep mobile data on while on Wi-Fi while others are not.

While keeping mobile data enabled has advantages and may even be required for some functionality, it may also drain battery quickly.

Full reading: https://www.ghacks.net/2018/11/20/reduce-android-battery-drain-on-wi-fi/