Italy extraordinary battery in long-term floating charge operation, voltage does not have what reason?

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