Precautions: 1. Suitable for 13S lithium-ion batteries, please use the charger in a dry place, unplug the charger after charging is complete. 2. Please confirm that the voltage and current of your scooter battery meet the output specifications of the charger, which is 54.6V 2A. 3. Please pay attention to whether the charging interface matches the charger interface before charging, so as not to damage the charger. 4. Connect the battery first, then connect the power supply; after fully charged, first cut off the power supply, and then unplug the battery plug. 5. Red light means the battery is charging; green light means the battery is fully charged or disconnected or not charging. 6. The charging time should not exceed 24 hours, please do not recharge the battery when it is exhausted. Otherwise the battery is easily damaged.