Charging shuts off when battery is fully charged. Meter shows current being drawn. Charger will not charge if hooked up to battery in reverse. Specifications: Manual 10 Amp charge at 12V Manual 10 Amp charge at 6V Automatic 10 Amp charge at 12V Automatic 2 Amp Charge at 12V 55 Amp engine start at 12V Manual 2 Amp charge at 12V
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