| 摘要 |
PURPOSE:To make it possible to check remaining capacity by visually observing, from outside, change of material generated by discharge. CONSTITUTION:An external circumferential observation window 11 makes it possible to check charge of surface of a zinc plate 4 by discharge through an external circumferential insulating material 5. Change of discharge can be checked easily by making it easy the identification of color by coating the external surface of zinc plate 4 with the material which enlarges surface change by discharge. The upper surface observing window 12 provided in the positive side makes possible change of color through a support ring 7, an external circumferential insulating material 5, an anode cover 8 and a packing 9 by changing color of display plate 13 through inductive transmission of change of chemical material 2 in the dry battery to the display plate 13 with a lead wire 14. |
