The charger features a built-in controller that prevents overcharging, overvoltage, reverse current, reverse polarity, short circuit, and overtemperature, ensuring safe and efficient charging. Its fully sealed waterproof design withstands harsh weather conditions, making it suitable for outdoor use. The charger is compatible with various battery types, including sealed lead-acid, lith... https://sunapex.co/product/sunapex-20w-12v-solar-battery-maintainer-white/