Attention: Never short-circuit the battery - this means that the positive and negative poles cannot be connected directly. In the event of a short circuit, the battery will become hot and may burst. Do not illuminate the battery with an open flame. Battery electrolyte is corrosive and should not come into contact with eyes, skin or clothing. Otherwise, immediately rinse the place where the electrolyte gets into with plenty of clean water.
Before charging, disconnect the wires from the battery poles, first the ground wire.
Before charging, check the electrolyte level, if necessary, add distilled water.
Thaw a frozen battery before charging. A charged battery freezes at approximately -65°C, a half-charged one at approximately -30°C and a discharged one at -12°C.
A battery that has been in a discharged state for a long time (deep discharge), when charging it with a conventional charger, it may not be fully charged or even not charged at all. In this case, an electronic charger should be used, as due to the low charging current, the battery will not heat up as much.
Before charging check battery voltage without load.
- Unscrew the plugs from the battery and put them on the holes. This prevents splashes of electrolyte on the lacquer due to the release of gases during charging.
Charge the battery only in a well-ventilated area. When charging the installed battery, the tailgate of the vehicle must be open.
During normal charging, the charging current value is approximately 10% of the battery capacity value. (That is, with a battery capacity of 50 Ah, the charging current is approximately 5 A). Then the approximate charging time of the battery can be taken equal to 10 hours.
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.
During charging, the temperature of the electrolyte should not exceed +55°C, otherwise stop charging or reduce the charging current.
- Charge the battery until all of its cells actively emit gas and until 3 measurements taken at intervals of 1 hour show that the electrolyte density and voltage no longer increase.
- After charging, check the electrolyte level, if necessary top up with distilled water.
- Check electrolyte density. If the density of the electrolyte in one or two adjacent cells is noticeably lower (for example, 5 elements show a density of 1.26 g / ml, e in one it is 1.18 g / ml), the battery is defective and should be replaced.
- Allow the gases to escape for about 20 minutes, then close the plugs.
Attention: Do not start the engine with the battery disconnected, as this will damage the electrical system.