Battery characteristics (Mondeo 2)

Nominal voltage is 12 V. The actual voltage depends on the degree of discharge of the battery; it may be higher or lower than the nominal value.

The nominal capacity determines the storage capacity of the battery, this is the capacity of a fully charged battery at a temperature of 27°C for 20 hours, while the voltage does not drop below 10.5 V (for example: the parking light of a car consumes 25 W, with an on-board network voltage of 12 V, the battery generates a current of 2.08 A, with a 40 Ah battery, the car can be parked with the parking light on for 25 hours).

Capacity - the current consumption (A h) contained in the battery depends primarily on the discharge current, temperature, degree of discharge and technical condition (aging) of the battery;

The cold cranking current (CCC) determines the battery's cold weather starting capability. This is the current that a battery with a nominal voltage of 12 V can produce at a temperature of -18°C, while the voltage does not fall below 9 V for 30 seconds, and below 6 V for 150 seconds.

Self-discharge. Chemical processes occurring inside the battery cause it to discharge. Even if no current consumer is connected, a charged battery loses about 0.5% of its charge daily; high temperature, damage and contamination of the battery cover also accelerate the discharge process.