12.6 volts as read with a digital DC volt meter.
A fully charged 12 volt battery will read about 12.6 volts, or 2.1 volts per cell.
Fully charged battery should have 12.6 volts. 75% charged 12.4 volts, 50% charged 12.2 volts, & 25% charged 12.0 volts.
With a fully charged battery (12.68 volts) and engine running at idle with no accessories on, 14.5 volts. You will not get a accurate reading if the battery is not fully charged.
12.7 volts
12.5 volts
Yes, a battery with only a 25% charge will read 12 volts. A fully charged battery will read 12.6 volts.
A fully charged 12 volt automotive battery should have 12.68 volts.
If you need to jump start the car then the battery may be fully charged but it is defective and needs replacing. A full charged battery will read 12.6 volts at the posts with the engine not running. 12 volts indicates the battery is only 25% charged.
Most batteries today are sealed so a hydrometer is useless. A fully charged battery will read 12.6 volts with a digital volt meter. At 75% charge it will read 12.4 volts, at 50% it will read 12.2 volts and at 25% charge it will read 12 volts. But if you have another type battery then here is what you need to know. A fully charged golf cart battery or fork lift battery will read 1300 A fully charged auto or truck battery will read 1275 A fully charge cell phone tower or solar storage battery will read 1250
Most batteries today are sealed so a hydrometer is useless. A fully charged battery will read 12.6 volts with a digital volt meter. At 75% charge it will read 12.4 volts, at 50% it will read 12.2 volts and at 25% charge it will read 12 volts. But if you have another type battery then here is what you need to know. A fully charged Golf cart battery or fork lift battery will read 1300 A fully charged auto or truck battery will read 1275 A fully charge cell phone tower or solar storage battery will read 1250
12.8 - 12.9 volts is a fully charged battery