The Battery Tender® Junior 800 is much more than a trickle charger. It has a brain. It's lightweight, compact, and very easy to use, especially in small spaces. With selectable battery type, It will keep your battery fully charged so that it is ready to go when you are! Output: 12V @ 800mA. Charger weight: 1 pound. Size: 4" x 2" x 1.37". Plugs directly into the wall. ISM™ microcontroller constantly updates charge sequence for smooth transitions between charging steps. Spark proof. Short circuit protected. Reverse hook-up protection. Selectable for AGM, flooded, GEL, or lithium (LiFePO4) batteries. Includes alligator clips and fused ring terminals. Lead acid safety timer: 80 hours. Lithium safety timer: 18 hours. Certification: BC, FCC. Five year warranty.