Smart battery flashing light indicates charging status in real time. Fast charging technology saves time and improves efficiency. Features over-current protection, leakage protection, full pulse charging, and multiple safety protections. Built-in smart chips and welding components use advanced electronic technology. ABS flame-retardant housing provides fire resistance and durability. Automatically identifies positive and negative terminals; reverse polarity results in zero output. Intelligent timing system automatically shuts down when charging is complete to prevent overcharging. Includes temperature compensation: automatically powers off in high-temperature conditions to ensure safety. Specifications: Type: 72V 20AH Output Voltage: 72-88V Output Current: 2.6 +/- 0.2A Input Voltage: 200V-220V 50Hz Battery Parameters: 6-DZM-20 Size: 18x8x6cm / 7x3x2.4in Color: Black Material: Plastic Package Contents: 1 x Electric Vehicle Charger Note: Other products are not included. Due to lighting effects and monitor settings, the actual color of the item may vary slightly from images. Measurement error allowed is +/- 1-3cm.