Black & Decker 2/4/6 Amp 12-Volt Smart Battery Charger

Fully Automatic Electronic Eight Minutes Charge To Start-5 Hours To Full Charge Three Stage Automatic Rapid Charging Light Weight, High Efficiency Design Heavy-Duty Cables And Clamps Automatic Float Mode Monitoring Charging Complete Indicator Reverse Polarity Indicator  Reverse Polarity Protection (No Spark ) For User  Compensates For Low Ac From Extension Cord Use Led Indicator For Charging Rate Selection  Microprocessor Control  (Digital Smart Control) High Frequency Power Conversion Technology Ul Listed 5 Year Limited Warranty