Battery

Battery

NOTE:
- Disconnection of battery
- Battery charging
- Welding work
- Jump starting

Battery care and maintenance
In today's low-maintenance batteries, check the acid level at least once a year. If necessary, top up with distilled water up to the top marking.
The increasing number of electronic control units in the car reduces the self-discharging time of the battery (even in standby mode). To maintain the battery service life and to avoid exhaustive discharging, recharge laid-up vehicles every 6 weeks at the latest (refer to battery recharging schedule here, SI 610 398 387 in TSBs). The self-discharging time is dependent on the vehicle model and vehicle equipment.

Battery test
The battery acid density can be used to measure the charge state. However this test produces uncertainty caused by a design-related range of variation. The acid density e.g. for a charged battery is 1.28 kg/l (in the tropical version the acid density is 1.23 kg/l).

Another interference factor is the acid lamination immediately after filling with distilled water.

Battery wear with partially sulphated and/or heavily contaminated plates will also lead to incorrect acid density test results.