Select "Sleep" and change when the device "goes to sleep"

Select "Auto Lock" to manually set when the device "goes to sleep".



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 3. Switch Off the Bluetooth

The second worst offender when it comes to battery usage is the Bluetooth connection. Bluetooth is only necessary if you tether your device to wireless earphones, so if you don't use it, switch the option off to save on precious battery life.



Go to device settings and select "Wireless Connections", then locate the Bluetooth tab and turn it off

Go to device settings, select the Bluetooth tab and switch it off

 4. Switch Off the Wi-Fi

All modern smartphones come with an integrated Wi-Fi adapter, which allows you to connect to wireless internet connections. While this option is more commonly used than Bluetooth, if you're not at a place that enables you to connect to a wireless network, then it's just wasting battery – when you're not in range of a known network, your phone uses more power as it keeps looking for one, sending a signal that costs you battery power.



Go to device settings and select "Wi-Fi" to switch it off/on

Go to device settings and select "Wi-Fi"