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Is your mount driven via the cigarette lighter socket on the power supply, which has a 120w [10amp] max output, or the 5.5mm socket, which has a
max of only 60w [5amps]? How long is the cable from the battery to the mount. If it is significantly longer than it needs to be, shorten it; that will reduce the voltage drop. If it is necessary for some reason to use a long cable, use a heavier one.
raymo
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