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 first, then unplug the battery. Unplugging the battery while charging, especially when the charging current is high (red light), may damage the charger. 2. When the LED light turns green, continue charging for an additional 2–3 hours. 3. Avoid fully discharging the battery before recharging. Charging after complete discharge may reduce battery performance or cause damage. 4. For long-term shallow discharge use, perform a deep discharge approximately every 3 months. This helps activate inactive materials within the battery. A deep discharge is indicated when the scooter’s controller triggers low-voltage protection. 5. Use the charger in a dry environment. 6. When not in use, disconnect the charger from the power source. 7. Confirm compatibility with your battery. This charger is designed for lithium-ion batteries. Do not use with LiFePO4 batteries, as this may cause overheating. Plug Type: EU Plug, compatible with countries including Indonesia, Germany, France, Spain, and Italy. Compatible with Ninebot ES1 Scooter and Ninebot ES2 Scooter. 100% with strong protection features. Input: 100–240V AC, 50/60Hz Output: 42V 2A Charge Indicator: Red light during charging, green when fully charged Safety Protections: Over-voltage protection (OVP), over-current protection (OCP), overload protection, short-circuit protection Material: Plastic Color: Black Package Contents: 1 x Charger Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1–3 cm.