Lithium batteries can be flammable and combustible especially when overheated. So, there are still some safety protocols to keep in mind with a hover board or any other devices such a laptop that uses a lithium battery. Make sure that when the hover board is recharged not to recharge it longer than is instructed in the user manual that is supplied with the hover board. Always use the charger that is supplied with the hover board and make sure that this remains in good condition. Also, make sure that the hover board is charged at room temperature. Another thing to do is to make sure a child understand not to drop the hover board, since this can also cause it to combust and to also avoid hitting anything sharp while riding it.