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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.


 
 
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Old Sun, January 18th, 2009, 05:10 PM
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One thing that people forget is that as voltage drops, current draw goes up. This means that as the battery falls below 12v, the current draw form peripheral devices goes up and causes the battery to discharge even faster. I don't have any data on the slew rate of the discharge vs. time, but suffice to say that it becomes quite aggressive as the voltage falls.
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