The battery's reading value will beshown on the LCD. C,AA,AAA,D,N,9V 6F22 batteries and 1.5V/3V button cell. Built of durable plastic and stainless steel and poweredby a singie 1.55V battery. Testable type:N, D,C,AA,AAA.14500,10440,16340,CR2032,9V.