Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH

Stay Charged: The 4 amp car battery charger automotive provides a full charge to your machine' s battery before automatically switching to float mode to maintain proper voltage levels for your battery without overcharging
Connect and Forget: With a low maintenance design, our universal vehicle charger and maintainer is compact, lightweight, and easy to operate even in small storage space for your convenience. Features 11 total feet of combined reach including 6 ft. AC cord and 5 ft. DC output charging cord.
Includes: 4 AMP battery charger, ring terminal and alligator clip combo cable, 5 year warranty, and lifetime customer service
Monitor Power Levels: A solid state two-color LED light indicates the charging status and if the battery voltage drops too far under load, ISM adaptive charging will resume full charger output power. It is UL/CSA, CE and BC approved
Safe and Secure: Spark-proof during lead connection and automatically detects reverse polarity to ensure a correct, locked-in connection before providing power
Versatility: Compatible with lithium (LiFeP04), lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell), this charger works with 6 volt and 12 volt batteries with the push of a button