Quote:
Originally Posted by BRZnut
the stock batteries have caps on the top to add distilled water to each cell when it gets low. It is hard to tell what the water level is but there is an upper and lower line on the outside of the battery. I just can never get a clear view of where the water line is. Anyone have a trick to tell?? (on my old cars I would bounce them and see how the water moves, but the BRZ is too stiff to bound up and down by pushing on it, plus you run the risk of denting in the sheet metal!)
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Never bounce or otherwise whack a wet lead-acid battery.
Inside the inspection/fill hole, there is a split tube that reaches down to the top of the fill line. You can see the meniscus touching it when you have the proper fluid level.
Someone else said it - use only distilled water.