C batteries power mid-sized electronics such as flashlights and portable radios. They have a nominal diameter of 26 mm.
Disposable standard batteries (also called household batteries) are the most commonly used battery sizes. They power everyday devices ranging from flashlights to GPS equipment. These batteries can be discarded when their charge runs out. Everyday (generic) and Premium (brand name) batteries are for use in low-drain devices such as flashlights, remote controls, clocks, smoke detectors, and other equipment that is used intermittently or draws little power for operation. High Performance batteries provide increased capacity to handle spikes in power demand from high-drain devices such as digital cameras, thermal imagers, digital audio, drones, video game controllers, GPS equipment, and keyless entry systems.