Leucodyes operate quite differently from liquid crystals. They are much less accurate than other thermochromic compounds and are used where accuracy is not an issue.(6) An interesting example is battery state indicators.(7) A layer of leucodye is applied on top of a strip and then each end is attached to the ends of the battery. Since the strip has a resistance, it heats up when the current of the battery travels through it, which is displayed by a change in color of the leucodye. Since the strip is triangular, its resistance is changing as you move along the triangle, and thus is heats up more at certain points along the triangle than at others. Therefore, the higher temperature parts of the triangle change the color of the leucodye and tell the consumer how much life is left in their battery.