Often car owners have situations when they approach their vehicle in the morning and can not start the engine due to the reason for the low battery. The battery is discharged for many reasons, including due to the old age and long idle time of the car on the street at a minus air temperature.
In this case, you should not immediately go for the purchase of a new battery, you can try to charge it. Do not immediately start charging the battery that you brought from a cold street with a minus temperature mode, you need to give the battery time to warm up in a warm room before charging it (several hours). Also, you do not need to charge an overly charged battery, such a charge will not be effective. Charging the battery is best, most efficient and safe at room temperature.
In inexperienced car owners, the question often arises: can you charge a 6v battery with a 12v charger? The answer is simple so you can do it. However, this can lead to heating the battery and it is quite dangerous when charging you should have an ammeter and voltmeter, through which you can constantly monitor the charge state, charging a lead-acid battery in this way would be more dangerous than charging with a traditional charger. The 6V battery can really feed 12V current. When charging it is necessary to watch closely not only the voltage but also the state of the battery, there should be good ventilation, the battery should not increase in size, during the charging should not be emitted any gases and vapor, if any of this began, immediately stop the charge. When a battery ruptures harmful to the human body, sulfuric acid is released. It is worth knowing that if you successfully charge the battery in this way, you can shorten its battery life. However, virtually all modern chargers contain fully controlled current, which is fed to charging, so they can be used to charge absolutely any type of car battery with equal or lower nominal voltage.
Normal chargers can not fully charge a fully discharged battery: the voltage will not exceed 12.4-12.5 Volts. These batteries are fully recharged in automotive workshops by experienced automotive experts.
15-16 Volt voltages, which charge most of the cheap chargers – is a powerful voltage that destroys the plates on the electrodes, which causes a partial overlap of the electrolyte access to the active mass of the electrodes. This ensures a partial drop in the battery capacity and the supply of cold start current.
At a normal voltage of a charge it is not necessary to unscrew the covers. Some batteries do not have them at all.
The best option for charging a battery is a modern charger, inside which is a processor, with which the device is able to select the desired level of current, voltage and can control it.
Battery charge time is 8 – 10 hours.