android background and auto start apps reducing battery life ?

how to prevent or stop auto-start services consuming CPU and why background running application in my mobile automatically restarts even after killing with the task killer? this is the common questions many android users ask! but many times these applications are started by some other applications and sometimes these running process may be vital so it is better to leave it as it is unless and until you are not technically challenged.

but if you really thinks those running services or background apps is causing serious battery drain or eating too much memory then
goto--> settings-->running services

now check which application has started the service as shown in above picture, if you think the services as started by some unwanted application try to remove those applications if the services is started by system then just leave as it is because many times killing those services do more harm than leaving because android is built on linux and it has good memory and CPU resource management system.

To conserve battery and memory you can disable sync service and enable it only when you want it, to disable go to -->settings --> Accounts and Sync--> Disable "Background Data" as shown in below pic.

bottom line no matter how many ever apps running in background they do not actually use batter power until they are actively doing something such as syncing contacts, receiving mails etc so stop killing these rooting apps because it takes battery power to kill these apps since they are services it again takes more batter power by the system to restart them again.

Still you are not convinced and you know better way to deal with them or handle these background process and save cpu and memory then do share with us