This car battery charger is suitable for all types of 12V and 24V lead-Acid batteries that are within 6-150Ah(12V), 6-100Ah(24V), including AGM, GEL, SLA, Flooded (WET), or any common automotive, deep-cycle, marine, or maintenance-free battery. Automatic sulfa-ting and acid stratification detection, One Key to Repair. The high-frequency and low-frequency pulse technology has good repair and activation effects. The intelligent battery charger can automatically detect outside temperature, auto-switch between SUMMER or WINTER mode, and self-appropriate raise and reduce the charging voltage. Reverse polarity protection (wrong polarity connection prompt), spark-proof, overvoltage protection, overcurrent protection, and short circuit protection.