Lead Acid Battery: Everything you need to know
A single cell lead acid battery has a nominal voltage of 2.0V, and can be discharged to 1.5V and recharged to 2.4V. A 12V lead acid battery has a nominal voltage of 12V, and a fully charged voltage of 14.4V, mainly due to the fact that a 12V lead acid battery consists of 6 single cell lead acid batteries connected in series.