Thanksfor this great stuff.
Reshared post from +Mohamed kamel
this could save your life …. your battery life that is :P
i've seen some ppl complaining about battery life in android phones
i remember something i was told when i was working in tech support, it's a magical rule that usually applies most of the time.
"the problem lies between the keyboard and the chair"
lol in that case the problem is holding the phone :P
just like ppl do with their desktops installing so much unneeded junk, phones are more sensitive to that.. so here are some thoughts to help ..
1- the screen is the biggest power drain you have, so low brightness is your best friend, i got used to 10% brightness and battery life is fantastic without power saving mode, remember automatic brightness is not enough.
also if you're not using the screen turn it off right away !
2- naturally live wallpapers and widgets use power so if you go nuts with those you can only blame yourself, i'm not saying dont use any, just be reasonable, and remember a shortcut on the home screen wont use power but a widget will… so a shortcut to say youtube is better than a widget …
3- apps that have services running in the background also use power and sometimes bandwidth too, so open your setting > applications and select the "running" tab … familiarize yourself with these, they are the services that always run in the background, like messaging services, email, some google services and so on.
games shouldn't naturally exist here, if they do it's usually because they are trying to push ads or notifications, either stop the service manually or if you can uninstall the game all together .. i don't recommend task killers
if you are very careful yet still you get bad battery life, this will help you understand the number 1 cause
for example in my galaxy note the processor is 1.4 GHz, obviously it doesn't run at 1.4 all the time, it ranges from 0.2 to 1.4
depending on the apps runningto save power, it also has another state which is "deep sleep". were the processor almost powers down, this happens when you turn off the screen.
sometimes an app is still running and still needs to use the CPU so it uses what is called a "wake lock" to keep the processor from going to sleep and interrupter what it is doing
this is all natural however if an app keeps a wake lock indefinitely the CPU will not go to sleep and drain so much power while you are not using the phone and this is not normal behavior
how can you check if you have a wake lock problem ?
there is an app called cpu spy
this app will monitor the processor state and report how much time it spent on each clock speed including deep sleep
so if you install cpu spy and turn off the screen for a couple of minutes making sure no app is working (downloading or running) and check back to see no deep sleep happened, you have a wake lock problem
now you need to find which app is doing this and uninstall it
you can check your progress by using this app
it will record an event every time the battery loses 1% and then calculate an average per hour, this way you can find out if you improved the battery or not