The following batteries are installed on the Audi-100:
- 12 V/40 Ah, type no. 54045 (only 4-cylinder engines);
- 12 V/63 Ah, type no. 56318 (other).
Battery parameters
Voltage and capacity: in the designation 12 V / 40 Ah, the first number (12 V), of course, indicates voltage. Behind the slash is the current that the battery is able to give per unit of time - Ah means ampere-hours. This is the nominal capacity of the battery, measured under regulatory conditions. In practice, only ⅔ of the indicated ampere-hours should be calculated; with an older battery, only half.
Cold cranking current: 220 A or 300 A indicates the amount of current that the battery can provide at a temperature of minus 18°C.
Type number: A five-digit number is used by all German battery manufacturers to identify the battery. For the Audi-100, the corresponding numbers are 54045 or 56318. The first number (5) means the battery voltage is 12 V. The following numbers 40 or 63 indicate the capacity of the battery. The last two numbers indicate design features such as model, polarity, venting hose and flare.
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