Opencircuit 12v Battery indicator display

12V Battery indicator display for lead batteries such as a car battery. This display can be placed directly on the battery voltage without additional wiring, the display contains a voltage converter to power the display itself. When the battery voltage falls below 11.2V, all 4 blocks are empty. With 12V, 2 blocks burn, with 12.5V 3 blocks and above 13.3V 4 blocks.