<P> Invented in its current form in early 2013 , the device is the subject of complex patent disputes . Volume manufacture started in China in 2014 and early units were prone to catch fire due to an overheating battery which resulted in product recalls in 2016 , including one of 500,000 units sold in the United States from 8 manufacturers . </P>
<P> Invented in its current form in early 2013 , the device is the subject of complex patent disputes . Volume manufacture started in China in 2014 and early units were prone to catch fire due to an overheating battery which resulted in product recalls in 2016 , including one of 500,000 units sold in the United States from 8 manufacturers . </P>
when did the self balancing scooter come out
when did the self balancing scooter come out
2014
2014