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  • Some says its finding satellite quicker thus less time searching, others adamant that it drain battery more having two system running.

    The latter. More satellite signals mean more computation required which means more battery drain.

    The time to initial lock of modern GPSes has been improved in lots of other ways (especially with the bluetooth/WiFi GPSes that download up-to-date ephemeris/almanac data rather than waiting to get it from the satellites themselves).

    #csb

  • GPS chips require power, so if you've got both running you'll obviously drain the battery quicker than if you just have one.

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