#Car battery indicator green free

Green indicates that the battery is fully charged.For example, in batteries that have a magic eye and show a green colour, a black colour and sometimes show total transparency, we have that: The spheres float depending on the density value of the electrolyte in the battery - remember that the density value is related to the state of charge of the battery. These spheres, when viewed from the top of the eye, project a colour.

It has inside it one or two small spheres, which slide into a groove. This magic eye is made of high-impact plastic material. If another battery starts the car fine or if jump starting works, then the most likely scenario is that your battery has a fault and should be replaced.The magic eye of a battery is a compact densimeter located covering the battery casing. Check that the battery terminals are clean and tight. If the car is not starting but the battery indicator is green. The correct way to interpret the Battery Indicator If the fluid levels of your battery go down too low, the Battery Status indicator will simply stop working and may remain stuck on the green side, thus giving a false reading. There are many other battery faults or potential issues which cannot be shown by the battery charge indicator.įinally, maintenance-free batteries contain electrolyte fluid. Because none of the cells in a battery shares its electrolyte (battery fluid) with the other cells, there is no way for the status indicator to check the condition of other cells which might have problems.Īlso, the state of charge of one cell will not tell you anything about the actual health of the battery. The most frequent question I get in regard to the battery green light is: “Why is my battery light green, but the battery is not starting?”Īnswer: The battery status indicator only gives you information about the state of charge of one cell (out of six cells) of the battery.

Black the battery needs to be recharged.

Most battery manufacturers advise that when the Battery Indicator/ Magic Eye is: It can give three battery condition readings but needs a little interpretation to understand if you really have a faulty battery. The state-of-charge indicator (SoC) is a quick way to check the condition of your lead acid battery when you have no other means of testing at hand.

#Car battery indicator green free

We cannot open sealed batteries, so it is impossible to use a hydrometer to check the condition of the cells of your sealed maintenance free battery. The car battery green light is also called the: In effect, it acts as a really simple hydrometer for one cell of the battery. The Eye is actually a colored ball in a small tube which moves according to the specific gravity of the acid in the battery. However, it may also be seen on non-sealed lead-acid batteries.įirstly, the “Battery Green Light” or Magic Eye is not a light. It is usually a feature of most completely sealed maintenance-free lead-acid batteries. It can give you an idea of your battery power and reveal some simple battery issues. The car battery green light is a small round window on top of automotive batteries, which changes color from green to black to white as the condition of a battery degrades.