Good Compatibility - Automotive battery charger perfect for all types of 12-volt lead-acid batteries, including Wet, Gel, and AGM etc. This smart car battery charger for automobiles, marine, boats, camper, trolling motor, watercraft, riding lawnmower, lawn tractor, etc. 4 Stage Charging State - This smart charger constantly monitors the battery level and automatically adjusts the converter output voltage based on the batterys charge status. LED indicator displays battery charging status at level of 25%/50%/75%/100%. The charger will stop charging automatically when the battery is fully charged. Easy to Use - Our trickle charger no need of any manual operation, just plug and leave it for charging and maintaining your batteries automatically for long time. The microprocessor controlled program will monitor the whole charging progress and automatically stop when the battery is fully charged. Safe and Durable - This smart charger automatically switch to maintenance mode with co