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My DCDC charger is discharging my cranking/starting battery too muchUpdated 3 months ago

If the ignition override cable is connected to a source not controlled by the ignition, the charger may display a false reading and thus allows your charger to draining the cranking battery too low. 

The easiest way to test is to completely disconnect your DCDC charger from the system and leave your vehicle overnight. If your cranking battery is still losing charge, there may be an internal issue with it or a parasitic load drawing from it that you may not be aware of. 

 

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