12V 800mA Automatic Battery Charger, Maintainer, and Trickle, perfect for charging and maintaining all 12V lead-acid, flooded, or sealed maintenance-free batteries (AGM and gel cell). Includes desulfation and optimization functions, zero output in standby mode, and spark-proof lead connection for safety. ETL/UL certified, with multi-level safety protection and 24-hour timer set up. Easy to use - just plug-in, connect, and charge.