What is the difference between static electricity and electricity from a battery/power plant? An object holding a static charge has an electric potential. If it touches an object with different electric potential a current will pass until the potentials are equalized. One can choose the zero potential.
The charge remains until it can move away by an electric current or electrical discharge. The word "static" is used to differentiate it from current electricity, where an electric charge flows through an electrical conductor. A static electric charge can be created whenever two surfaces contact and or slide against each other and then separate.
The phenomenon of static electricity requires a separation of positive and negative charges. When two materials are in contact, electrons may move from one material to the other, which leaves an excess of positive charge on one material, and an equal negative charge on the other. When the materials are separated they retain this charge imbalance.
Voltage is a fundamental electrical measure that indicates the electric potential difference between two battery points. It determines the amount of electrical force the battery can deliver to a circuit. The higher the voltage, the more power the battery can provide to a device.
Voltage serves as an indirect indicator of both percentage and SoC. Each type of rechargeable battery has a specific voltage range corresponding to its charge state. For example, a fully charged lithium-ion battery typically shows a voltage of around 4.2 volts per cell. In comparison, a fully discharged cell might drop to about 3.0 volts.
An object holding a static charge has an electric potential. If it touches an object with different electric potential a current will pass until the potentials are equalized. One can choose the zero potential. I think the most sensible way is to say that an object with the same amount of protons and electrons has zero electric potential.