Use and maintenance of the charger: 1. When charging, first connect to the battery, then connect to AC; after full charge, disconnect AC first, then remove the battery plug. If you remove the battery plug first during charging, especially when the charging current is high (red light), it may easily damage the charger. 2. When the LED light turns green, please continue charging for 2-3 hours. 3. Please do not let the battery fully discharge before recharging. Otherwise, the battery may lose protection or become damaged. 4. For long-term shallow discharge batteries, perform a deep discharge approximately every 3 months. This is known as re-lighting and helps activate materials deep inside the battery that are not in use for long periods. Re-lighting refers to the controller's battery under-voltage protection action. 5. Please use the charger in a dry place. 6. When not in use, do not leave the charger connected to the power supply continuously. 7. Please confirm your battery type, as this charger is designed for lithium batteries. Do not use this charger with LiFePO4 batteries, as it may cause overheating. Plug Type: EU Plug, applicable for Indonesia, Germany, France, Spain, Italy, and more. Compatible with Ninebot ES1 Scooter and Ninebot ES2 Scooter. 100% New and high quality with strong protection features. Input: 100-240VAC, 50/60Hz Output: 42V 2A Charge indicator: Red light indicates charging, green light indicates full charge Safety protection: OVP/OCP/Overload protection/Short-circuit protection Material: Plastic Color: Black Package Contents: 1 x Charger (Only the above package content, other products are not included) Note: Lighting and different displays may cause slight color differences between the item in the picture and the actual product. Measured with an allowed error of +/- 1-3cm. About Shipping: All items will be shipped within 3 business days after payment is received. Delivery usually takes 8-12 days, depending on circumstances. For any questions, please feel free to contact us. We will respond within 24 hours. Thank you for your cooperation and we hope to provide you with a satisfying shopping experience.