How full should battery water?
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Also to know is, what happens if you overfill a battery with water?
If you put too much water is in the battery, when the car is started, the acid will spill. If there is too much water in the battery, the rising water level from the reaction will cause the water to overflow. This causes valuable acid inside the battery to be lost.
Similarly, how do you know when your car battery needs water? To get the most out of your car battery life you should understand how to check if the water is low. Usually there is a clear “eye” on the top of the battery that displays a green light if the water level is good and a dark light if the battery needs water. Be sure to use distilled water.
Likewise, people ask, how much water goes in a car battery?
Just remember that the battery acid/electrolyte is composed basically of 75% distilled water and 25% sulfuric acid. When the battery heats up or goes through a thorough charging, it will naturally lose some water due to evaporation.
Is it OK to add water to a battery?
Use only distilled water to fill the cells. Distilled water can be purchased at most grocery stores. If the electrolyte levels in the cells are low (plates are exposed), fill each cell to just cover the plates. Then use a battery charger to recharge the battery, or just drive the car for a few days in normal service.