BATTERY SPECIFICATIONSNAMEPARAMETERSBatteryLithium-ion batteryCharging Time2 - 3 HoursVoltage36VCapacity4.4AhWorking Temperature0°C-40°CCharging Temperature0°C-40°CWARNING – Risk of Fire and Electric Shock – No User Serviceable Parts.• Warranty void if the security seal is punctured,Website:http://www.sz2wheels.com, broken or tampered with.• Do not expose to temperatures above 43°C• Do not throw the battery away in the trash or in fire. Batteries should be recycled or disposed of as per state or local guidelines.• For normal charges, the battery temp should be between 0°C-40°C, the charge time may increase at colder temperatures.• Use at temperature below 40°C, charge fully prior to long storage periods or if it has been stored for more than three months.• Do not charge unattended. Do not charge for more than 8 hours. Do not charge while hot.• Use only with specified manufactured and model charger in instruction• For service, contact support at: sales@sz2wheels.comFeatures:1) Two wheels hover board with rechargeable Lithium-ion battery 2) This scooter uses gyroscope sensors to enable self-balancing  The inner workings of the hover board use gyro sensors, two 250Watt motors 3) Users can control the vehicle to go forward, accelerate, decelerate, turn around, bread or others by leaning forward or leaning backwards4) Max weight 100kgs, min weight 20kgs5) With a full charge it has a range of roughly 15 km and a highest speed at 10km/h6) The hover boards are green product helpful tool in outdoor, and easy for carry. Also can be a funny entertainment tool as well as skateboard.7) For your safety it is recommended to wear protective gear such as a helmet, elbow pads,knee pads, etc, when operating hover board8) Do not use balance scooter if you have a history of heart disease, high blood pressure, or are pregnant/nursing.9) Certification: CE, RoHs, FCC & UL2272