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All car batteries work with a weak acid in them. Many modern batteris are 'low maintenance', so they don't need looking at. Most older car batteries needed topping-up with pure water (not tap water) as evaporation occured.

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Q: Why some car batteries have water in them?
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What brands of car batteries have the best user reviews?

Some of the best brands of car batteries according to users are DieHard from Sears, NAPA batteries, EverStart batteries found at Wal-Mart, and Costco's Kirkland batteries.


Does water go in car batteries?

Automotive batteries generally have a liquid electrolyte in them. The electrolyte is usually a solution of sulfuric acid and water. Occasionally, under adverse conditions some of the water will evaporate. Some auto batteries have caps, plugs, or covers on the top of the battery allowing you to add water if the liquid level drops. However some [if not most today] auto batteries [sometimes called "Maintence Free"] do not have any way to access the cells to add water. There is also a new "dry cell" type of battery that does not have liquid in it.


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You can't "recycle" a battery but there are rechargeable batteries. Rechargeable batteries range in size anywhere from AAA to car batteries.


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What are some popular battery car systems?

There are several battery car systems that can be considered popular because many people used them. These are the flooded cell batteries, sealed batteries, deep cycle batteries and lithium-ion batteries.


Car batteries can explode.True or false?

Some car batteries can catch fire after crashes. It is not unheard of. They do not randomly explode, however, if that's what you're worried about.


Can you use boiled water in car batteries?

No, boiling water only kills the germs and bacteria in the water. It does not remove minerals. Use only distilled water in a car battery.


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Twelve volt car batteries can be purchased from several places. Some of these include Auto Zone, Advance Auto Parts, Sears, Batteries Plus, and Apex Battery.


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Why are some car batteries labeled "maintenance free"?

Maintenance free means just what the names implies. You will not need to add water to this battery ever.


Do you need to add water to a car battery?

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