Never short-circuit the battery, i.e. the plus (+) and minus (-) of the battery should not be connected to each other. When short-circuited, the electrolyte boils and the battery may burst. Do not expose the battery to open flame. Battery electrolyte is a caustic substance and should not come into contact with eyes, skin or clothing, in which case wash off the electrolyte with plenty of water.
The battery can be charged in the mounted state, but first disconnect the ground (-) and positive wire (+).
Caution! This disconnection will erase the operating parameters from the fuel injection control unit memory, the radio code memory for the anti-theft device and the set radio station frequencies. Therefore, before disconnecting, be sure to read the instructions in "Removing and installing the battery".
Before charging the battery, check the electrolyte level and add distilled water if necessary.
Thaw a frozen battery before charging. A charged battery freezes at a temperature of about -65°C, a half-charged battery at a temperature of -30°C, and a discharged battery at a temperature of about -12°C.
* Unscrew the plugs from the battery or press them with a narrow screwdriver and lightly screw them into the holes. As a result, electrolyte splashes will not get on the varnish coating, and at the same time, the gases formed will escape.
Charge the battery only in a well-ventilated area. When charging a built-in battery, open the engine hood.
With standard charging, the charging current is about 10% of the capacity (for a 50 Ah battery, this is about 5.0 A). As an approximate value, you can take 10 hours of charging.
Connect the positive pole (+) of the battery to the positive pole of the charger, and the negative pole (-) of the battery to the negative pole of the charger.
The electrolyte temperature during charging should not exceed +55°C, otherwise stop charging or reduce the charging current.
* Charge until all battery cells are actively releasing gas and during three subsequent measurements of the electrolyte density at one-hour intervals, these values and the voltage do not increase any further.
* After charging, check the electrolyte level and add distilled water if necessary.
* Check the electrolyte density. If its value in one cell is significantly lower than the values in other cells (for example, in five cells the density is 1.26 g/ml, and in one - 1.18 g/ml), then the battery is faulty and must be replaced.
* Allow the gases to escape from the battery for 20 minutes, then tighten the caps.
Caution! The engine must not rotate when the battery is disconnected, otherwise the electrical equipment will fail.