Designation
Located on the battery case, contains technical data. For example: 12 V 66 Ah 200 A (12 V - nominal voltage, 66 Ah - nominal capacity, 200 A - control cold discharge current).
Rated voltage
For all models, the total voltage is 12 V. The operating voltage depends on the state of charge of the battery and may be lower or higher than the nominal voltage.
Rated capacity
Battery characteristic indicating the amount of energy (A/h). Indicates the amount of energy a fully charged battery can deliver at 27°C for 20 hours, provided that the voltage does not fall below 10.5V (discharge voltage). With an onboard voltage of 12 V, the current from the battery is 2.08 A according to the formula
A (current strength) = W (power) / IN (voltage)
Thus, a battery with a capacity of 66 A / h will theoretically provide power to the side light lamps for 30 hours. In practice, if you leave the car with the lamps on, the battery will be discharged after 15 hours. An active alarm will drain the battery in approximately 8 hours.
Capacity
The amount of electricity supplied in A / h. Depends primarily on the discharge current, the ambient temperature, the state of charge of the battery and the general condition of the battery (service life).
Cold Discharge Control Current
Determines the ability of the battery to start the engine at a negative temperature (measured in A). A certain discharge current drawn from a 12V battery at -18°C, provided that the voltage does not drop below 9V for the first 30 seconds, and below 6V for 150 seconds.
Self-discharge
The chemical processes inside the battery cause self-discharge even when no consumers are connected. A charged battery loses approximately 0.5% of its charge daily. High temperatures, damage to the battery and soiling of the battery cover accelerate the self-discharge process.