Battery Pack: 12V, 1/3 AA or 1/3AA, Nickel-Cadmium (NICAD) Type This battery pack is designed to provide reliable power for various applications. It features a 12-volt nickel-cadmium (NICAD) chemistry and is available in two sizes: 1/3 AA and 1/3AA. The 12V rating ensures optimal performance, making it suitable for use in devices that require consistent voltage output.