When charging a battery with sealed terminals outside the vehicle, install an adapter. Make sure all charger connections are clean and secure. For best results, the battery should be charged when the electrolyte and plates are at room temperature. Extremely cold batteries may not charge for several hours after starting charging.
Charge the battery until the green dot appears. During charging, the battery should be checked every 30 minutes. Tilt or agitation may be necessary for the green dot to appear.
After charging, the battery should be tested.
The time required to charge the battery depends on the following factors:
- battery size - for a fully discharged heavy-duty high-capacity battery, it takes 2 times more time than to charge a passenger car battery;
- temperature - it will take longer to charge the battery at -18°C than at 27°C. if the charger is connected to a cold battery, the state of charge will be very low at first, but as the temperature of the battery rises, the state of charge will increase;
- charger capacity - a charger with a charging current of 5 A will take longer to charge than a charger with a charging current of 30 A or more;
- states of charge - charging a fully discharged battery requires twice as much charge as charging two half-discharged batteries, because in a fully discharged battery, the electrolyte approaches almost pure water in composition and is a poor conductor. Then, as the charging current leads to an increase in the acid content of the electrolyte, the degree of charging increases accordingly.
Before charging, disconnect the positive cable from the battery, then the ground cable.
Before charging, check the electrolyte level, top up with distilled water if necessary.
frozen battery (a battery whose electrolyte is frozen) defrost before charging. A fully charged battery freezes at -65°C, a half-charged battery freezes at -30°C, and a discharged battery freezes at -12°C.
Charge the battery only in a well-ventilated area. When charging the installed battery, leave the car hood open.
During normal charging, the value of the charging current is approximately 10% of the battery capacity. (that is, a 50 A battery should be charged with a current of approximately 5.0 A). Charging time approximately 10 hours.
Connect the positive terminal of the battery to the positive wire, the negative terminal of the battery to the negative wire of the charger.
During charging, the temperature of the electrolyte should not exceed +55°C, if necessary, interrupt charging or reduce the value of the charging current.
Pic. 7.5. Battery charger