D batteries

D batteries are large cylindrical power sources used to run high-energy devices like flashlights, toys, and portable radios. They typically have a voltage of 1.5 volts each and store a substantial amount of electrical energy, enabling longer use for demanding devices. Their size allows them to provide more power compared to smaller batteries, making them suitable for equipment that needs sustained, longer-lasting energy. D batteries are widely available and can be disposable or rechargeable, serving as a reliable power option for various household and industrial applications.