FeaturesCharge and maintain 12V lead acid batteriesRecondition mode for deeply discharged batteriesSwitch from charge to maintain mode automaticallyLCD display shows charge status and selected modesProtects against short-circuits & polarity inversionThe Stanley 12V 8A Battery Charger is a powerful everyday charger for all types of vehicles using 12V batteries. The charger will recover and charge until your battery reaches optimal voltage, automatically switching to maintain mode to keep charge level at 100% and avoid overcharging.  Thanks to the built in RECOND mode it will also recondition deeply discharged batteries. POWER SUPPLY mode will supply 13.8V - 5A constant current to allow you to use electronic devices while in use.