61 00... Battery, general information
Battery care and maintenance:
In low-maintenance batteries, check the electrolyte 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 vehicle 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. The time for self-discharging depends on vehicle type and equipment specification.
Battery test:
The battery acid density can be used to measure the state of charge. However this check 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 variant for hot countries the acid density is 1.23 kg/l).
Another interference factor is the acid layer immediately after filling with distilled water.
Battery wear with partially sulfated and/or heavily contaminated panels will also lead to incorrect acid density test results.
Battery charging:
Lead-acid battery, AGM battery:
To prevent the intelligent battery sensor from malfunctioning, use the charging points in the engine compartment.
Observe instructions on INTELLIGENT BATTERY SENSOR/BATTERY ELECTRONICS .
The charging voltage that is generated by existing chargers that are designed for the lead-acid or AGM battery is too high for the lithium ion battery.
This excessive charging voltage may in some cases result in the separating switch of the lithium ion battery being opened . This does not damage the lithium ion battery. The separator switch will close again when a charging voltage of < 14 V is applied at the battery terminals.
Before charging a lithium ion battery, adjust the charging voltage of existing charger adapters once.