Dry battery indicating capacity though self color

The utility model relates to a dry battery indicating the capacity though self color. The dry battery comprises positive electrode power, a negative electrode zinc can and electrolyte, wherein a thin wall is arranged on the wall of the negative electrode zinc can, the thickness of the thin wall is the same as that of zinc being consumed until the battery is discharged off, PH test paper is pasted to the outer part of the thin wall; the PH test paper is sleeved with a brand sheath of the battery; and a transparent window is reserved in the position of the PH test paper on the brand sheath. When the battery capacity is used up, the thin wall is punched, and the electrolyte is in contact with the PH test paper, so that the changed color of the PH test paper can directly be seen on the brand sheath of the battery. Therefore, the dry battery has the advantages of simple structure and reliability.