Italy battery in - floating charge operation, voltage not have what reason?

At present are VRLA battery float uneven phenomenon, which is by the error of parts and material quality, and content of each in the production of accumulation, especially the VRLA with a lean liquid , the error will affect sulfur acid saturation inside battery, which directly affects battery float recombination of , so that the potential floating charge battery, floating voltage of the battery not the same. But VRLA battery after running a period of time the float, float voltage to be uniform. Because the high sulfuric acid of the battery oxygen efficiency, so that a decline in saturation, the voltage is also more floating.
Another battery connected in with a large pressure , and the connection bar bad contact, the new in the operation of ~ three months, there be uneven.