In this case, the No. 9 balance car can be recharged with lithium-ion batteries, which can be used with charge; The rated power of the charger is 70W, and it takes about 4 hours to charge from 0 to 100%. The full charge and discharge cycle of the battery can still maintain more than 60% of the electricity. Avoid using batteries at temperatures below -10 ° C or above 50 ° C or storing batteries at temperatures below -20 ° C or above 50 ° C, (