1. 7-Level Automatic Charging: This is a fully automatic battery charger with 7 charging stages. Automatic charging prevents overcharging the battery, so you can keep the charger connected to the battery indefinitely. The 7-stage charger is suitable for most battery types, including calcium batteries, gel AGM batteries, lithium batteries, lithium iron phosphate batteries, wet batteries, and lead-acid batteries. It can also help restore drained and sulfated batteries. 2. Battery Type: Most types of lead-acid batteries, including calcium batteries, gel AGM batteries, lithium batteries, lithium iron phosphate batteries, wet batteries, and lead-acid batteries. Switch Mode Technology: Yes Polarity Protection: Yes Output Short Circuit Protection: Yes Non-Battery Link Protection: Yes Over Voltage Protection: Yes Input Voltage: 100-240V AC, 50-60Hz Rated Output Power: 12V 6A, 24V 3A Minimum Start-up Voltage: 8.0V Battery Range: 6-120Ah Efficiency: Approx. 85%. Compliance with Standards: CB, CE, IEC60335, EN61000, EN55014 Dimensions (Length × Width × Height): 160 × 100 × 50 mm Weight: 450 grams.