The battery runs flat too fast

The battery runs flat too fast

Problem: This is one of the most often Android problems. Unfortunately, we have to face the fact that our Android device will never run for as long as old simple mobile phones used to some years ago.   This is the price we have to pay for having the smartest devices in the world.

However, we can always do something to extend the battery life here and there and, overall, the above price won't be so high! :)
Solution: To put it simply, you have to get rid of anything that's eating up your battery unnecessarily. In most cases, this will be WiFi (enabled and not used), GPS, a number of unnecessary apps running in the background, screen brightness set to maximum or ads from free apps and games for Android. You should also use some battery app to manage apps or/and some Android app killer.
If your battery is running flat and you cannot charge your phone, you should turn Power Saver. In my HTC, you can activate it by dragging the top part of the screen down and then checking Power Saver (see the screenshots below).