> Why is distilled water used for car batteries? Won't spring water work?

Why is distilled water used for car batteries? Won't spring water work?

Posted at: 2015-01-07 
My son in law put spring water into my car battery and now it won't start. Is it forever dead?

Adding spring water, or lake water, or tap water isn't ideal, but didn't cause your problem. If the battery was that dry, it likely was overcharged, which cooked out the water. Overcharging also destroys the battery -- your regulator (part of the alternator assembly these days) is supposed to stop charging the battery when it's at 12.6. The fact that it isn't giving power might mean only that it needs a charge -- every garage should have a small 2 - 10 amp charger if not a bigger one. A 10 amp will charge a car battery in a few hours, and at 2 amps it will give a nice robust charge overnight. Spend $15 - 20 on a charger and try that first. Only add battery acid if it spilled out, due to being turned over, etc.

Yup its a gonner, Spring water has lots of minerals in it, mostly for taste, Distilled water is nothing but pure H2o. Battery's don't like minerals in there water, And adding Electrolyte/battery acid to an already charged battery is also a good way to destroy it, Michael most likely believes in the Easter bunny, that's why he gets a thumbs down,

Distilled water has all of the other chemicals except CO2 removed from it. Spring water has all kinds of salts in it which will interrupt the chemical reaction that allows a battery to store electrical energy. That battery is KAPUT.

Michael, you never add battery acid to a battery that has already been charged and used

id say the water he added is fine but the problem is if there is no acid left.

Heat a half quart of distilled water to about 150 degrees F and add 7 or 8 oz. of Epsom salts. Stir until the Epsom salts are completely dissolved..Remove the battery caps and carefully drain the water from the battery. fill each cell full. replace the caps and shake battery vigourously for few minutes to make sure the solution makes its way through each cell. and do a slow recharge over night. you may need to charge it to capacity several times over the next few days to get the battery in a like new condition.

No, but it needs to be re-charged. Spring water is fine, MFG's just don't want you putting in particulates, like ditch water or something. If one or more cells were completely dry, MAY have a dead cell/s and battery needs to be replaced. Try charging 1st.

It does not matter, I believe you are supposed to use battery acid... Still if it does not take a charge, from experience you would be better off getting another battery the fool with it.

My son in law put spring water into my car battery and now it won't start. Is it forever dead?