Save money by preventing a no start situation! The BEX-1500 1.5 AMP battery charger is fully equipped with sophisticated circuitry that will safely charge and maintain batteries without overcharging. Charging lights will tell you what stage of charge your battery is currently taking. Compatible with all Lead Acid Batteries: Standard (Flooded), AGM, and Gel Cell. Fully automatic 'smart' charging with advanced circuitry enables energy efficient safe charging via Auto Meters advanced software and digital circuitry. Charging Modes: Desulfation Bulk Absorption Maintain. Indicator Lights: AMBER (Desulfation) - The battery extender is in desulfation mode, RED (Charging) - The battery extender is charging the battery, GREEN (Maintain) - The battery extender is safely maintaining your battery at full charge. Your battery is ready to go when you need it.