What is a valve control type lead acid lithium battery?

In the valve control lead-acid batteries ( Lithium battery) Mainly of hydrogen and oxygen in the production of cells is restructuring into water. Leakage is the smallest, while some still escape if restructuring cannot keep pace with the evolution of the electrolyte. The lead-acid battery does not need to ( And make the impossible) Regularly check the electrolyte level, they are known as free maintenance batteries. However, this is a bit of a misnomer. Valve control type lead acid lithium battery needs maintenance. As the loss of electrolytes, valve control type lead acid lithium batteries have lost their ability to 'dry'. This can be achieved by testing on a regular basis, the internal resistance of conductance or impedance measurements. Regularly test showed more participate in the test and maintenance is required. Recent maintenance program has developed a allows the rehydration, tend to restore a large number of incapacity.