[DNK76]

Charging the AGM battery
constant tension
U = 14.5V to 14.8V maximum starting current 0.25 C (battery capacity) 20 hours
and 4 hours 0.025C (battery capacity)
90AH x025 = 22.5A
The problem is charging the battery with a constant current without voltage limitation in the so-called fast chargers the current can not exceed 0.1C,
setting greater than 14.9V will damage the AGM battery
The battery in the BSD system is charged only up to 60-80% of the capacity
because they have to take charge of the energy when charging, with the system of energy recovery from braking, please read ist,
setting of 14.5V -14.8V will never damage the AGM battery
The charging current will be reduced to very low values
I've seen a current of about 2A with ignition off on a weak battery and never before connected probably the charger for programming maybe at ASO,
Generally, diagnostics and programming do not take more than 3-5 hours
13.6V-13.8V is the limit voltage only for voltage sustain
With a low battery, you may see a low battery warning message and turn off the KL15 which happened to me at 13.8V,
The instruction states that the charger must not be connected to the extreme discharge
battery,
As a rechargeable battery, it is not possible to charge more than 0.25C of battery capacity
As for the usual battery it writes to not exceed 14.2V