1. Dim the screen
Whenever the screen's on, battery power is being used up. Adjusting your phone's out-of-the-box display settings can save power. Dim the brightness level to the lowest you need, and change your backlight-on and screen timeout to the minimum settings you require. You can find the display adjustment or power saver options in your phone's settings menu.
2. Switch off Bluetooth
You may think it's less hassle to leave it on, but Bluetooth nibbles away at your battery power. So whether you use Bluetooth for a handsfree headset, transferring music or images, or one of many other Bluetooth applications, the rule is the same: when you're not using it, go into the menu system and turn it
3. Unplug the Wi-Fi
Similarly, if your phone is one of those high-end handsets with Wi-Fi connectivity, don't leave it running in the background - it will devour power.
4. Switch to flight mode
In some situations where you want to listen to tunes or play games but don't need the phone connected - travelling on the Underground/Metro, when you're out of network coverage, or perhaps at night - you can save power by switching to 'flight mode'. This automatically turns off the mobile phone's radio transceiver and Bluetooth, reducing power consumption, but allowing you to use other functions. This means, though, you can't make or take calls or receive texts, so remember to turn it back to 'normal' mode when you need to.
5. Close unnecessary applications
It's easy to leave power-sapping applications, such as a music player, running in the background, particularly on a smartphone where there are plenty of functions you can flick between. It's usually straightforward to check which applications are open, and to close ones that aren't needed.
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