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Help GPS power drain?

It's more likely to be the car charger. They usually deliver either 500mA (which is the maximum current draw for a USB device when connected to a PC) or 1A, which will allow your phoen to charge while using GPS.

Mine is an older car > usb adapter and still allows my phone to drain slowly due to this limit!
 
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It's more likely to be the car charger. They usually deliver either 500mA (which is the maximum current draw for a USB device when connected to a PC) or 1A, which will allow your phoen to charge while using GPS.

Mine is an older car > usb adapter and still allows my phone to drain slowly due to this limit!

This. Check your car charger and see if it's the 500mA or the 1A output. If it's the 500mA version, look for a 1A charger.
 
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