Best way to charge / safest / is to remove battery from vehicle ...set battery in a open well venilated area / no smoking / with the apporpiate capacity 12 volt charger / read the instructions that come with the charger . Attach red connector of charger to positive post of battery (usually red) attach black connector to battery ground (-) negative side of battery / plug charger into appropiate outlet (120) . Reverese application when battery is fully charged .
Re-install battery in vehicle/ being sure to re-install as removed .
Install black cable to battery (-) negative ...then Hot (red) (+)
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