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Old 01-27-2013, 02:49 PM
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2000 E320......Battery Drain

My E320's battery lasts around two weeks without driving before going dead. I have ran a drain test on it and I only get .02 amps. Is this enough to kill the battery after two weeks? I pulled all fuses and I can only get it lower with the fuse for the radio out. I had original battery when first happened then replaced it with a new Interstate and it is still happening. Any ideas?

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Old 01-27-2013, 05:20 PM
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Join Date: Oct 2007
Location: SoCal
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The radio (if MB) has two 12v supplies. One switched by the ignition and one permanent for station memory and to play radio with ignition off. Maybe some leakage there.

20 milliamps isn't too high but for 2 weeks is probably enough. I checked mine after replacing the battery (MB) and got 3 milliamps.

Maybe just put a 'top off' or float charger on the battery. They're only a few bucks at Harbor Freight. Pretty much designed for this problem.

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1998 E320 Wagon
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