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Why is map always open!?!?!

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no but see i tried just letting it run and boy did it have an impact. without anything running in the background ill have no percentage loss for like an hour or 2. with maps or sprint navigation running it will go down like 5-10% in 30 mins. something is very fishy here

Don't worry about the background services, they do not hurt anything by being there. Use SystemPanel and you will see that if you do not use Maps the CPU usage of the background service will be 0 or 1 seconds total no matter how long your phone is on. That number increases when Maps is actually active, in the foreground.

There is one very useful exception to this. Once you initiate Navigation Mode in Google Maps, it assumes you are trying to get somewhere and it does the correct and convenient thing: it stays running in the background, keeps the GPS active, and announces your upcoming turns regardless of whether you (or one of your passengers) are in a call, at the home screen, or in any other application.

This uses quite a bit of battery, as it should. Using your numbers, 10% battery in 30 minutes would mean it can last 5 hours in Navigation mode. In my experience it is closer to 3.5-4 hours. In any case this is impressive, and it is on par with many dedicated GPS units that have similar screen sizes.

Remember when using Google Maps Navigation that once you get where you are going to hit Menu and then Exit Navigation. Usually it will ask you if you want to exit once you arrive.
 
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