Xtend 12V 4amp Battery Charger and eXtender for all SLA AGM SLI Gel Batteries Free Shipping 1-3 day delivery if ordered before 3pm EST Perfect for charging all 6 Volt and 12 Volt batteries with an automatic charge cycle switching to float mode once battery is fully charged. 12 Month Warranty, 60-Day Money Back Guarantee Monitors temperature effect - No overheating, overcharging, and microprocessor controlled with multi-stage charging. Three color LED indicator light system for easy use and quick disconnect harness with reverse hookup protection