Formation, which means conversion, is the process in which the cured green plate is converted into a cooked plate under the action of electric energy.

Lead acid batteries have existed since the end of the 19th century. They have the characteristics of high performance, low cost, easy recovery and charging. Their efficiency is relatively high, about 80 – 90%. However, when high power is discharged, the available capacity of the batteries is reduced. Therefore, the discharge depth of lead acid battery is limited.