A roundup of terms, concepts, and acronyms to amp up your fluency. A battery cell is the smallest energy-storing unit of a battery. A battery cell comes in various physical forms, from a small AA cell that you might find in a TV remote to large-format prismatic cells typically used in energy storage systems.
Capacity is a measure of the amount of electrical energy a battery can store, typically expressed in ampere-hours (Ah) or watt-hours (Wh). A correction factor that accounts for the reduced capacity of a battery when discharged at a higher C-rate than specified.
Rated capacity is the amount of energy a battery can store and discharge under specified conditions. Typically measured in ampere-hours (Ah) or watt-hours (Wh). It indicates the energy a battery can deliver at standard temperature and discharge rate, providing insight into battery performance.
Battery State of Charge is the charge left in a battery, usually represented as a percentage from 0 to 100%. While often thought of as a "fuel gauge" for a battery, this measurement does poorly predict remaining energy, as changes to several external factors can influence a battery's usable energy.
A battery cell is the smallest energy-storing unit of a battery. A battery cell comes in various physical forms, from a small AA cell that you might find in a TV remote to large-format prismatic cells typically used in energy storage systems. A battery pack is a collection of battery cells packaged into an application-specific format.
In battery systems, wattage is used to indicate the amount of power a battery can supply for a specific duration. A Watt-hour is a unit of energy equivalent to the power consumption of one watt for one hour. It is used to quantify the amount of energy stored in a battery and helps to estimate runtime for different loads.