AkkuCapacity

AkkuCapacity is a term used to describe the energy storage capacity of a rechargeable battery or battery pack. It indicates how much electrical energy the cell can deliver before its voltage drops to the end-of-discharge threshold. In practice, AkkuCapacity is expressed in ampere-hours (Ah) or milliampere-hours (mAh) for most consumer devices and in watt-hours (Wh) when comparing energy content across different voltages. The relation Wh = V × Ah applies, where V is the nominal voltage.

Measurement and rating: The rated capacity is determined by standardized discharge tests defined by manufacturers or industry standards. The test involves discharging the battery from a full state at a specified rate, called the C-rate, to a specified cut-off voltage, under controlled temperature. Real-world capacity may differ due to temperature, discharge rate, depth of discharge, and aging.

Factors and implications: Capacity is central to runtime, range, and endurance of devices. Batteries tend to lose capacity over time through chemical aging. Higher-capacity cells increase runtime but also weight, size, and sometimes cost. Peukert's law describes how available capacity varies with discharge current for certain chemistries.

Applications: AkkuCapacity is a consideration in consumer electronics (phones, laptops), electric vehicles, power tools, and stationary energy storage. Battery manufacturers publish nominal or typical capacities, with performance-rating accuracy improving via standardized testing and temperature-control guidelines.

See also

- Battery capacity

- Energy density

- State of charge

- State of health

- Peukert's law

- End-of-discharge voltage

- Battery management system