AAAA batteries are cylindrical-shaped batteries with a diameter of 8.3 mm and a length of 42.5 mm. They are used in small devices like laser pointers, LED penlights, glucose meters, small headphone amplifiers, battery-powered computer styluses, and other gadgets.
A23 batteries are batteries in the shape of a cylinder with a diameter of 10.3 mm and a length of 28.5 mm. They are mainly used in keyless vehicle entry systems, garage door openers, home security systems, Bluetooth headsets, and other devices.
CR123A batteries are cylindrical-shaped batteries with a diameter of 17 mm and a length of 34.5 mm. They are used in cameras that require a large amount of energy.
CR2 is another popular type of battery for cameras. They have a cylindrical shape and a diameter of 15.6 mm and a length of 27 mm.

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