How long does a 12 volts battery take to charge?
When the 12 volts battery is completely out of power, the general charging time is 8-10 hours. It is recommended to buy a special charger for charging, so as not to affect the normal use of the battery. It is also recommended to charge for a limited time, no more than 12 hours. Overcharging can cause severe water loss and affect battery life.
1. Generally, more than 20% of the battery is left in the battery, and the chemical conversion efficiency of the battery is about 50% when charging. When the battery is fully charged, it needs to increase the charge by 150%*80%.
2. The best charging current for a battery is 10% of its capacity. But the charging time needs 150%*80%/10%=12 hours, plus the time of phased charging is about 1 hour.
3. In order to meet people's schedule, the charging current of 13% capacity is generally used in the design, so that the charging time is at least 150%*80%/13%=9.2 hours, plus about 1 hour for incremental charging.
4. Fast charging, generally with 20% of the battery capacity, charging time is 150%*80%/20%=6 hours. Using a higher current to charge, although the charging time is shortened, is harmful to the battery, so use caution.