Anyone with a touchscreen smartphone knows that battery life is something you have to constantly keep an eye on. Regardless of the model of phone, or OS you may be running, chances are that at some point or another you've looked into ways to make your battery last longer, even if it's just a matter of carrying a charging cable with you at all times. As smartphones get more powerful, and users can do more, battery life will keep taking more hits. Microsoft sees this, and has built Batter Saver settings into Windows Phone 7 Mango.
If you're an Android user, you know that there are dozens if not hundreds of apps dedicated to squeezing more juice out of your battery. Most include turning off certain features like background data, GPS, and mobile syncing, though some go so far as to throttle your core CPU speed in order to save power. A new screenshot from the beta of Windows Phone 7 Mango shows that Microsoft has built in a Battery Saver setting into the OS. The setting says it will turn off services like e-mail and apps running in the background in order to conserve battery life, though the phone will still be able to send and receive texts and phone calls. The feature can be set to turn on automatically when the battery is low, or turned on manually any time.
The report from HTC Source claims an increase in battery life up to around 30% even with heavy usage of e-mail, web, and SMS. That would be pretty impressive if it holds true for other users. Here's to hoping this becomes a ubiquitous setting for all smartphone OSes!