Advertisement
A3.24
Checking and recharging battery
Checking battery state of charge
Use a digital multimeter to measure the battery state of charge.
Clean the battery poles and clamps adequately.
Connect the terminals of the digital multimeter to the battery poles.
Read the battery voltage value from the display of the digital multimeter.
If the battery voltage measured is greater than 12.70 V, the state of charge is 100%.
If the battery voltage measured is between 12.45 V and 12.70 V, the state of charge is 75% to 100%.
If the battery voltage measured is between 12.36 V and 12.45 V, the state of charge is 50% to 75%.
If the battery voltage measured is less than 12.36 V, the state of charge is 0% to 50%.
Recharge the battery (
Perform only if the battery voltage measured is less than 12.5 V.
Recharging the battery
Three charging methods are possible for "AGM" (gas recombination) batteries: FAST, SLOW and DEEP
charging.
FAST charging is used for a partially or completely discharged battery
SLOW charging is used for a partially or completely discharged battery
DEEP charging is used for batteries that have discharged as a result of prolonged inactivity (over 2 weeks).
Clean the battery poles and clamps adequately.
Connect a stabilised battery charger to the battery.
FAST charging
While the battery is charging, check that the internal battery temperature never exceeds 45°C.
If the temperature exceeds 45°C, interrupt charging and wait a few hours before completing.
At the end of the recharge cycle, battery voltage must be at least 14.4 V - 14.8 V.
If this voltage is NOT reached (even if the battery was charged at constant current), this indicates a
general deterioration in the state of the battery. In this case, replacing the battery is recommended
even if the vehicle will start.
Charge at a constant voltage of 14.4 V to 14.8 V, at ambient temperature and with limited initial charge
current.
For L3 12V 70Ah 760A EN batteries, the maximum initial charge current must be between 18 A and 30
A.
Charge cycle duration: min. 4 hours, max. 6 hours.
A3.24).
Advertisement
