Fully Automatic 9-step 12V lead-acid battery saving charger, tester and maintainer Delivers up to 6A charge current, ideal for all 12V lead-acid (STD/AGM/GEL) batteries; Ampmatic technology lowers charge rate for smaller batteries Multi-step program saves from 0.5V, then charges and balances cells within the battery quickly and efficiently Regulates charge voltage to ambient temperature - fully charges battery even when cold, avoids overcharging when hot. CHARGER OPTIMATE6 12V 6A