What Is The Voltage Of Fully Charged 12v Battery. Battery voltage reacts highly to charging and discharging. Will you check the voltage before using your new lithium-ion battery.

Will you check the voltage before using your new lithium-ion battery. With experience one can accurately determine state of charge using a voltmeter. Normally a 12 Volt battery is fully charge with an at rest Voltage of around 127 - depending on manufacturers specs.
A voltage value of 127 volts and above indicates a 100 percent charged battery.
A fully charged battery will typically display a voltmeter reading of about 126 to 128 volts. A fully charged car battery voltage should be 126v or above this is with the engine off. When a car drops for instance from 126 to 120 there will be 75 difference. Typically speaking a flooded cell lead acid deep cycle 12 volt nominal battery at rest with a full charge will be 126 volts.
