Use and maintenance of the charger: 1. When charging, first connect to the battery, then connect to AC power; after charging is complete, disconnect from AC power, then remove the battery plug. Removing the battery plug during charging, especially when the charging current is high (red light), may damage the charger. 2. When the LED light turns green, continue charging for 23 hours. 3. Do not fully discharge the battery before recharging. Doing so may prevent charging or damage the battery. 4. For long-term shallow discharge use, perform a deep discharge approximately every 3 months. This helps activate inactive materials within the battery. Deep discharge refers to the controller's battery low-voltage protection activation. 5. Use the charger in a dry location. 6. When not in use, disconnect the charger from the power supply. 7. Confirm your battery type, as this charger is designed for lithium batteries. Do not use it with LiFePO4 batteries, as this may cause the charger to overheat. High-quality, super strong protection. Output: 42V 1.52A Color: Black Material: Plastic Plug Type: EU Plug (compatible with countries such as Indonesia) Voltage: AC 100240V Package Contents: 1 x Charger 1 x Plug Only the above package content is included; other items are not included. Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 13 cm.