Good point. That's probably similar to the battery drain you'd have anyway if you were constantly running a task that monitors your location.Third party apps can't run/listen in the background, so not available. But honestly, WiFi uses negligible battery when the screen is off. So my WiFi has been on 24/7 since January. Compared to 3G only prior to that, I may be seeing a 5-9% difference through a full day.
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