如何实现免维护？How it can be maintenance free?

1.水平双极电池本质是仍然是阀控式密封铅酸蓄电池，其特点是采用了新型的材料和新的结构，因此其和普通的AGM密封反应原理是一样的。

The essence of bipolar pure lead battery is still a valve regulated lead-acid battery, which is characterized by the use of new materials and new structure, so it has the same reaction principle as the ordinary AGM battery.

2.全密封结构。

Sealed construction.