Batteries are electrochemical power sources that store energy and deliver it as electrical power to a circuit. Within the Power category, this classification covers battery products used as standalone energy storage elements or as part of broader power architectures.

Batteries are generally defined by their chemistry and construction, which determine how energy is stored, how it is released, and how the battery is managed during operation.

• Primary batteries: Non-rechargeable cells designed for single-use energy delivery.
• Secondary batteries: Rechargeable cells designed for repeated charge and discharge cycles.

This category focuses on the battery as a power component, distinct from related items such as battery holders, chargers, protection circuits, and power management ICs.