Easy to Connect: This solar panel battery charging kit includes 43.3-inch (1.1m) alligator clips, 43.3-inch (1.1m) O-ring terminals, and a 43.3-inch (1.1m) cigarette lighter plug, plus a 122-inch (3.1m) extension cord. Just plug and play for quick charging All-Weather Durability: Our IP67 waterproof solar battery charger maintainer works reliably from −40℉ to 185℉, withstanding wind, rain, snow, and sun for long-term outdoor use. (Keep panel stationary during use. Do not use while the vehicle is in motion to prevent vibration or falling off) Safe Charging Controller: Built-in microcontroller provides multiple protections including overvoltage, overcurrent, short circuit, over-discharge, overcharge, and overheating. Optimize charging efficiency while safeguarding your battery and solar system Wide Compatibility: Compatible with multiple 12V batteries, including LiFePO4, Li - ion, AGM, Gel, SLA, EFB. Our solar battery trickle charger maintainer is suitable for motorcycles, boats, cars, SUVs, RVs, vans, campers, automobiles, snowmobiles, etc High-Efficiency Charging: VEVOR 20W 12V solar panel battery charger is built with efficient monocrystalline cells and high transparency ETFE film, delivering higher conversion efficiency and faster charging speed, ensuring your battery gets fast power replenishment