Regarding valve-regulated sealed lead-acid batteries, sealed batteries and gel batteries are all types of lead-acid batteries, we will call these batteries below.

The capacity of a battery is the amount of electricity that a fully charged battery can provide under specified conditions, in ampere-hours. The calculation formula of capacity is: C=I*T (that is, capacity is the multiplication of current and time)

Since batteries rely on chemical reactions to produce electricity, their usable capacity depends in part on how quickly you try to charge or discharge the batteries relative to their total capacity. The total capacity is a method of measuring how much energy the battery can store, and is often represented by C. Typically, the capacity of a battery is checked at a 20 hour rate, 10 hour rate, 5 hour rate, etc. The battery capacity corresponding to different hour rates will be different.

The battery capacity usually has the following expressions:

1 Theoretical capacity

Theoretical capacity is also called the calculated capacity is determined by the amount of active material contained in the battery plate. For Pb, the electrochemical equivalent of lead-acid batteries is 0.517 A·h/g for Pb and 0.259 A·h/g for Pb02. The 4-valence is 0.488 A·h/g and the 2-valence is 0.224 A·h/g. The capacity calculated from the electrochemical equivalent and the amount of active material is called the theoretical capacity of the battery.

2 Actual capacity

The actual capacity refers to the capacity measured when the battery is discharged during the actual discharge and use. It depends on the amount of active material, use environment, use method, etc., but it is not equivalent to the lead weight, and the structure of the battery plate The form, the size of the discharge current, the temperature, the termination voltage, the quality of the raw materials and the manufacturing process, technology and use methods are related and change.

3 Rated capacity

The rated capacity is also called the nominal capacity, which is the lowest working capacity that the battery can discharge under the conditions specified by the manufacturer.