BATTERY VOLTMETER

摘要

The present invention discloses a battery voltmeter comprising: A) a dielectric layer, B) a conductive layer above or below one of the surfaces of the dielectric layer; and C) a temperature sensitive color indicator layer in thermal contact with the conductive layer, characterized in that the conductive layer has i) thermal insulating means under one of its surfaces and ii) sufficient heat generating capacity to affect a change in the temperature sensitive color indicator layer. The voltmeter cna be intergrated into a label and attached directly to a battery.