# Reverse Osmosis water in battery

**URL:** <https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49124>\
**Category:** Maintenance/Repairs\
**Tags:** escort, ford\
**Created:** [May 20, 2010, 9:10pm UTC](https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49124 "2010-05-20T21:10:13Z")\
**Posts on this page:** 5\
**Page:** 3

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**Author:** ![Renegade](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@Renegade](https://community.cartalk.com/u/Renegade)\
**Post date:** [June 27, 2021, 11:32pm UTC](https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49124/42 "2021-06-27T23:32:30Z")

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[quote=“It\_s\_Me, post:38, topic:49124”]  
I have only ever used tap water on the rare occasion it’s been needed with plans to replace the battery and/or get the charging system corrected asap.  
[/quote

Like you I am not a battery expert also like you I have only used tap water when needed maybe half a gallon over 50yr’s

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [June 27, 2021, 11:49pm UTC](https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49124/43 "2021-06-27T23:49:13Z")

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> [@Nevada\_545](#):
>
> People still add water to batteries

And from the result, they clearly should not, should they?

So what happens in 10 years with respect to car batteries to end that?

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**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\
**Post date:** [June 28, 2021, 3:22pm UTC](https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49124/44 "2021-06-28T15:22:10Z")

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> [@Mustangman](#):
>
> So what happens in 10 years with respect to car batteries to end that?

We’ll start topping up batteries with crocodile tears. 😆

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<div class="post-metadata">

**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [June 28, 2021, 3:28pm UTC](https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49124/45 "2021-06-28T15:28:27Z")

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> [@circuitsmith](#):
>
> We’ll start topping up batteries with crocodile tears.

Or maybe Unicorn spit? 🤪

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**Author:** ![B.L.E](https://avatars.discourse-cdn.com/v4/letter/b/848f3c/32.png) [@B.L.E](https://community.cartalk.com/u/B.L.E)\
**Post date:** [June 28, 2021, 6:13pm UTC](https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49124/46 "2021-06-28T18:13:31Z")

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> [@MikeInNH](#):
>
> RO water is just highly filtered water. It’s about 98% pure water. Distilled water is 99% pure water. Distilled water is created by actually boiling water…then funneling the steam through pipes into another container where there’s nothing left but pure water. All the other contaminates were left behind because they were too heavy.

RO water isn’t 98% pure, it likely was more than 99% pure before the RO filtration, sea water is 96.5% percent pure water. RO removes 98% of the impurities is what I think you meant. Essentially water is forced through a membrane with pores so tiny that only the tiny water molecules will fit through. This takes a lot of pressure and the output of the filter is a trickle. It can remove impurities that go right through a still. It can turn sea water into fresh water and filter out odors as well. A still will not remove odors from water.

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