# Reverse Osmosis water in battery

**URL:** <https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49123>\
**Category:** Maintenance/Repairs\
**Created:** [May 20, 2010, 9:09pm UTC](https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49123 "2010-05-20T21:09:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![juancrow](https://avatars.discourse-cdn.com/v4/letter/j/f19dbf/32.png) [@juancrow](https://community.cartalk.com/u/juancrow)\
**Post date:** [May 20, 2010, 9:09pm UTC](https://community.cartalk.com/t/reverse-osmosis-water-in-battery/49123/1 "2010-05-20T21:09:26Z")

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Is it OK to add reverse osmosis water instead of distilled?  
  
  
  
 I believe RO leaves behind slight amounts of minerals, but distilled might leave behind a few chemicals too, like chlorine.  
  
  
  
 So is it 6/half a dozen? Or is distilled the only way to go?  
  
  
  
 Also, is it possible to revive a dead battery by topping it off with water and slowly charging it with a charger?  
  
  
  
  
  
 Thanks