If your electric mountain bike has leakage, do the appearance check first, find out the leakage of acid leakage;
Then take the lid off to see the impermeable acid leak around the cap valve, and then open the cap valve to observe the flow of electrolyte inside the battery.
After the above work has been completed, if no abnormal is found, the airtightness test should be done (put into the water to inflate and pressurize, observe whether there are any bubbles in the battery or not, and if there are bubbles, it is indicated that there is leakage of acid leakage.
In the process of charging, the flow electrolyte is observed, and if so, the reason is explained.
In the charging process, if there is a flow of electrolyte should be exhausted.