Can a maintenance-free battery be filled with liquid? Is it effective to fill a maintenance-free battery?

In recent years, maintenance-free batteries can be said to be quite hot, not only have the advantages of high performance, long life, etc., but also have relatively small self-discharge. However, some small partners have such a question, if the battery discharge is small, it is not necessary to replenish the electrolyte. So, can the maintenance-free battery be filled with liquid, and is the maintenance-free battery filling effective? Next, let's find out together.

Due to its structural advantages, the maintenance-free battery consumes very little electrolyte, so there is basically no need to add liquid during the service life. But what we call maintenance-free is not really maintenance-free, but compared to ordinary batteries, there is no need to worry about maintenance.If there is a water shortage, It must be supplemented, otherwise it will not only cause the battery capacity to decrease, but also cause the internal structure to deform. Of course, there are some maintenance-free batteries on the market, and the corresponding electrolyte is already added and sealed up when leaving the factory, and users cannot add replenishment at all.

It is worth mentioning that the battery should be fully charged (not discharged) before adding water. Why? It is because when the battery is out of power, the electrolyte level will be much lower than normal. If it is just saturated when the battery is out of power, it will definitely overflow a lot when the battery is charged. So this can explain why the discharge treatment should be carried out before adding water. As for how to fully charge it, we can use common battery chargers on the market to charge, and when fully charged, we can add water.