Wide Application: 8 amp battery charger maintains and charges all type of 12V and 24V lead-acid battery from 6Ah-150Ah (12V), 6Ah-100Ah (24V), including AGM, GEL, Calcium, MF, SLA, VRLA, WET batteries. Perfect for charging and repairing cars, trucks, motorcycles, lawn mowers, boats, SUV, ATV, etc. Multiple Protection: Overvoltage protection, overcurrent protection, short circuit protection. Built-in a fan to prevent overheating while charging. Reverse polarity protection, wrong polarity connection prompt, spark-proof. Easy to Use and Visualized Charge: The large LCD display the charging and battery status; Battery power indicator, charge voltage and current, inside temperature, battery charging percentage, summer mode, winter mode, etc. More convenient to use. 6 Charging Mode: The smart charger can automatically detect outside temperature, then auto-switch between SUMMER or WINTER mode and self-appropriate reduce or raise the charging voltage. CAR/TRUCK mode (12V 8A / 24 4A) for fast charging big batteries, MOTORCYCLE mode (max 1.5A) for small batteries, AGM mode for AGM, and calcium batteries, REPAIR MODE for repairing old batteries. Pulse Repair Function: The advance REPAIR mode can help to recover old/idle batteries and extend battery life. The high frequency and low-frequency pulse technology has good repair and activation effects.