A smart phone’s low battery warning is the only warning that most people take seriously. Try the following steps and you will improve your battery life.
1. Let there be less light
For larger smart phones, the longer the screen is on and the brighter it is, the faster your battery goes. Try making the screen as dark as you can bear it and still read a text. Darkening the screen is common among teenagers, but it may be hard for Mom and Dad to see what’s showing on their phone.
2. Turn off the signals
Your smart phone does a lot of communicating in the background. They’re checking for things like new emails, text messages, Wi-Fi signals, Bluetooth signals, your location and more. These activities do drain your battery life, so you should turn off whatever you aren’t using. Location Services is also another feature that burns up your battery, so you can use GPS and Wi-Fi to find out which apps have access to Location Services and turn them off.
3. Turn off notifications (通告)
Another way to improve battery life is to stop the constant flow of notifications and updates from Facebook, email, games and sites. Your phone will automatically pick up these notifications when it’s connected to the Internet, and they can have a noticeable impact on battery life.
4. Use battery saving mode (模式)
For a quick way to improve your battery, simply put your smart phone in Airplane Mode. If Airplane Mode is too limiting, some phones have a specific battery saver mode. This shuts down unimportant functions and apps like Wi-Fi, some updates and more.
If used properly, these tips above will improve your battery life up to 30 percent.
The underlined word “drain” means “       ”.

A．light up	B．use up
C．pick up	D．make up

If you want to improve your battery life, you are advised to use a       .

A．small screen	B．large screen
C．bright screen	D．round screen

We can infer that aged people tend to       .

A．email family members	B．use Location Services
C．darken the screen	D．brighten the screen

We can learn that Airplane Mode can       .

A．improve signals	B．waste energy
C．affect health	D．save power