2001_Ford_Explorer_Sport_Trac Wiki
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In 20+years, this vehicle has had three 12v Batteries; average BatteryLife has been ~7years. A good new fully charged Battery is 12.7~12.8v with the Engine off & is able to hold a charge for many weeks; Voltage & Crank capacity decline with age; below 12.3v, a new Battery is required. My philosophy when replacing a Battery: new one should have the highest available ColdCrankAmp\CCA rating that fits the stock Tray & will connect to existing FrameNegativeBlack & 12vPositiveRed cables; the BatteryPost orientation needs to be considered. If either old Terminal is corroded or damaged or will not tighten proper, new HeavyDuty hardware should be used; all electrical connections should be installed & maintained Clean+Shiny+Tight.

Links To Related Info

Thanks go to the brave souls who've preceded me in similar adventures & freely shared their experience:

https://www.explorerforum.com/forums/threads/4g-alternator-rebuild-with-pictures.476293 Alternator ReBuild
https://youtu.be/BqVwn9BfuOk?t=27 Terminal MoldedCovers
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