Disconnect the wires from the battery before charging.
Check the electrolyte level before charging. Top up with distilled water if necessary.
Before charging the battery, its temperature should not be lower than +10°C. If the battery has been frozen, it must be thawed. A fully charged battery freezes at -65°C, a half-charged battery freezes at -30°C and a fully discharged battery freezes at -12°C.
Charge the battery in a well ventilated area. When charging the battery in a car, you need to open the hood.
Under normal charging, the charging current is approximately 10% capacity (The battery has a capacity of 50 A hour - respectively 5 A). The normal charging time is 10 hours.
Connect the positive pole of the battery to the positive pole of the charger, the negative pole to the negative pole of the device.
The temperature of the electrolyte during charging should not exceed +55°C. Otherwise, stop charging and reduce the charging current.
Charge until no more steam is emitted from the battery sections and three measurements of the specific gravity of the electrolyte and voltage taken within one hour do not give the same result.
After charging, check the electrolyte level. Top up with distilled water if necessary.
Attention: When the battery is disconnected, the engine must not be started. This may damage the electrical equipment.
Accelerated charging. Starting the engine from an external source of energy
Charging the battery or starting from a booster charger may only be carried out in exceptional cases, as the battery is exposed to high current. The charging current should not exceed 15 A. Batteries that have been stored for a long time without being used should not be charged using the accelerated method.