... .we are a professional manufacturer with 4years experience of the electronic products including the Smart Balance Scooter,Laptop,Tablet PC,Power bank ... protection8.CE,FCC,Rohs have approved Q:How long does the battery last?A:The battery has a range of 15-20km and ... -artificial quality problems.1.one year for the main vehicle,except the battery,tires and the plastic casing.2.six months for battery ...