1. Smart Sonic Electric Toothbrush 2. Product Information 1. Name: Smart Sonic Electric Toothbrush 2. Model: C Series 3. Main power: 2.5W 4. Battery: 18500 type lithium - ion battery, 1200mAh, 3.7V 5. Charging base input: 5V DC, 500mA 6. Handle material: Plastic 7. Brush head material: Bamboo 3. Toothbrush Storage and Charging 1. For initial use (e.g., a newly acquired product) or if not used for more than 3 months, charging should be done according to the remaining power. 2. The suitable charging temperature is between 5 degrees Celsius and 35 degrees Celsius. If the temperature is too high or too low, the charger may not charge properly or may not charge at all. 3. To keep the battery charged, it is suggested to charge in two stages, which can also save charging time. 4. It is normal for the machine to heat up during use and charging. 4. Charging Instructions 1. The charging time is around 7 hours. 2. The charging status indicator light starts flashing first, goes out after 3 seconds, and then enters the charging state. 3. When the intensity indicator light turns green and remains on, it indicates that charging is complete. 4. When the intensity indicator light flashes yellow, it means the battery is low. Press the on/off button, and the yellow indicator light will flash for 2 seconds and then go out. 5. Battery information: When five LED lights are on simultaneously, it means the battery level is over 90%; when four lights are on, it means the battery level is over 75%; when three lights are on, it means the battery level is over 50%; when two lights are on, it means the battery level is over 25%; when one light is on, it means the battery level is over 15%. If the yellow indicator light is on, it means the battery level is below 10%, and it will flash 4 times as a reminder.