Conventional flooded batteries are marked 6N or 12N to show voltage, and you can also tell by the number of cell caps – 6-volt batteries have 3, 12-volt batteries have 6 (there is one cap per cell, and each cell is always 2 volts). This is a list of the sizes, shapes, and general characteristics of some common primary and secondary battery types in household, automotive and light industrial use. For starters, two terminals are necessary to act as the positive and negative terminals. Two main components define every battery: positive and negative ends that link to a system or. Common examples of such codes are 12N14-3A, YB16L-A2, YTX14AHL-BS, YTZ7S, so let's look at what the codes mean for those batteries as a demonstration: 12N14-3A: 12N indicates a 12-volt battery of the conventional flooded (wet cell) type. Check your tool's manual or look for a sticker on the tool itself.