Aisikai Advanced Intelligent Battery Charger 6A 12V 24V for Diesel Generator Parts. Three-Stage Charging Method: Constant current then constant voltage to avoid overcharging and extend battery life. Wide Voltage Input Range: Accepts AC 90V to 305V input for stable operation in various conditions. Comprehensive Protection: Features short circuit and reverse connection protection for safety. Adjustable Charging Parameters: Voltage and current can be adjusted via potentiometer on site. LED Status Indicators: Displays AC power and charging status clearly with LED lights. Extended Battery Life: Optimized charging extends battery life by up to 30%. High Reliability: Operates normally in temperatures ranging from -30 to 70 degrees Celsius. One-Year Replacement Warranty: Includes a one-year replacement warranty for peace of mind.