Features: High quality This battery charger uses a micro MCU controller to manage the battery charging process. It has battery online detection, short circuit protection, overvoltage protection, reverse connection protection and other functions. Smart charging indicator light direct display dual digital LED display high power rechargeable automatic smart car battery charging 12/24V. Specifications: Product Name: Intelligent Pulse Multi-Function Repair Charger Voltage Range: 110V-250V Specifications: 18.5*14cm Working Efficiency: 98% Rated Power: 400W Working Temperature: -30℃ to +50℃ Working Mode: Precharge-Constant Current-constant-voltage-trickle charging The actual output current of the 12V battery is about 40A. The actual output current of the 24V battery is about 20A. Operation method: Step 1: Check the battery voltage. The 12V battery voltage is higher than 11V (do not plug in 220V, just plug in The charger clip is clamped on the positive and negative terminals of the battery, and the display shows the current and voltage). The voltage is lower than 11V, there will be repair steps later: Step 2: The charger is not connected to the battery, only 220V is plugged in, and the display is on. Manual/maintenance gear, the display voltage is about 16V; automatic/smart, the display voltage is about 15V. Step 3: Charger, plug in 220V, clamp the battery to the battery, the display will show the current (full charge may directly enter the empty state) Loading status, the current value will be displayed after full charging, not equal to 0) Packing list: 1 x battery charger 1 x user manual