*please see photos for specs* Features : An automatic battery charger stops charging when the battery is full. You can leave the charger connected to the battery without risk of overcharging. Once the battery is full, the battery charger will automatically start to maintain the battery. The charger monitors the battery Voltage and continues to top up the battery, keeping it fully charged and ready for use. Thermal Overload/Polarity Protection Prevents the output leads from sparking due to accidental reverse connection or short circuit making the charger safer to use around batteries. LED Charge Indication Three LEDs display the charger’s status (except AC250B). • RED LIGHT ON: Power On, • ORANGE LIGHT ON: Charging, • GREEN LIGHT ON: Fully charged and maintaining.