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Old 07-19-2009, 02:02 PM   #1 (permalink)
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Default GPS and Battery Use

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Does anyone know whether leaving GPS turned on on a device like the Storm or the Tour uses up battery juice if you don't have an application which accesses the GPS running?

Also, does an app like Google Maps use juice running in the background (regardless of GPS) or does it "sleep?"
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Old 07-19-2009, 05:09 PM   #2 (permalink)
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The GPS isn't on unless an application opens a connection to it. Once all connections are closed the GPS is turned off. In some modes that applications can select, the GPS is powered down between fixes.

On GSM units Google Maps goes into cell tower location mode when in the background (unless IIRC specifically configured to keep the GPS on for Latitude). CDMA units may be different.

The GPS does use a lot of battery power, as does the increased traffic to download maps or other data on demand. Google maps is fairly good at limiting this if it is in the background, Blackberry maps is low impact because it uses vector map data which requires less data.
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Old 07-19-2009, 05:29 PM   #3 (permalink)
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Well, that's probably the most authoritative reply I've seen around here... Thanks for the great info!
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