Do electric vehicle batteries need maintenance?

Because the battery will produce hydrogen and oxygen gas during the charging process, most of the gas will be compounded into water in the battery, and only a small part of the gas will be discharged out of the battery through the safety valve, which will cause the battery to lose water for a long time. Therefore, after the battery has been used for 8-10 months or when the power box is hot while charging, it is best to go to the after-sales service outlets for inspection and maintenance.