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Old 03-25-2020, 09:49 AM   #1
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Batteries — how much water is too much?

Checked the water level on my two Interstate flooded batteries this morning, and they looked good ... I think.

But ... where should the water level top off?

How much water is too much?
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Old 03-25-2020, 10:04 AM   #2
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Checked the water level on my two Interstate flooded batteries this morning, and they looked good ... I think.

But ... where should the water level top off?

How much water is too much?
The water level should be between the ring at the bottom of the vent and the top of the lead plates. If you're filling, the water needs to cover the top of the plates.
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Old 03-25-2020, 10:40 AM   #3
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Watering Battery

When you add water to the battery use only "Distilled Water" not regular tap water. Available at the store in gallon container for under $1.00.

The wife may already have some if she does any ironing. Most irons recommend using only distilled water. Happy travels.
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Old 03-25-2020, 11:10 AM   #4
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The plates need to be covered.
I only used distilled water, and add until the water distorts in the "ring" below the filler cap.
I keep a turkey baster just for water.
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Old 03-25-2020, 11:25 PM   #5
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Turkey baster is a great idea. Easier to refill than my squirt bottle.
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Old 03-26-2020, 02:02 AM   #6
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Quote:
Originally Posted by WhereStream View Post
Checked the water level on my two Interstate flooded batteries this morning, and they looked good ... I think.

But ... where should the water level top off?

How much water is too much?
Does your owner's manual not "cover" this?



This Battery School site is a great resource:

http://www.batteriesnorthwest.com/batteryschool.cfm

Please note cautions . . . like . . . fill water only after recharging.

You should wear gloves and safety goggles when filling the batteries, and yes a turkey baster works great.

A fowl idea?



Peter
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Old 03-26-2020, 07:53 AM   #7
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Quote:
Originally Posted by Mollysdad View Post
The plates need to be covered.
I only used distilled water, and add until the water distorts in the "ring" below the filler cap.
I keep a turkey baster just for water.
This is exactly what I do, fill until I see the water level distort. I use my EZ-Red Hydrometer instead of a turkey baster. The EZ-Red Hydrometer is also useful to test condition of your batteries: https://www.amazon.com/dp/B000JFHMRU..._t1_B0050SFVHO
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Old 03-26-2020, 10:03 AM   #8
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Thanks, everyone.

The “distorts the bubble” is great advice.

Currently, water covers the plates but does not quite touch the little site tube.

That seems good enough for now, as I have only tap water to add.

Distilled water doesn’t cross the “vital need” threshold, so not making a run to the grocery and mixing it up with all the frantic folks there.

Is this question addressed in the owner’s manual?

Don’t know. Extracting info from the manual can be a time-consuming process sometimes.

Easier and more fun to ask here.

If that’s an Airforums faux pas, please let me know.
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Old 03-26-2020, 11:56 AM   #9
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The batteries usually come with enough acid to cover the plates..seldom up to the ring. That being said, the original acid concentration can handle dilution water up to the ring. The charging replenishes the acid concentration. Running with acid above the plates is perfectly acceptable till you get the distilled water. Try to find real distilled water, not steam distilled water... which used to be the only available type. Steam distilled water still has some salts contamination.
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Old 03-26-2020, 12:50 PM   #10
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Technically, you are supposed to put the water level 1/8" below the plastic that distorts the water. But its really hard to judge when you are 1/8" below the plastic. Therefore, I just fill until I see the distortion. Here is Trojan's excellent "Battery Maintenance Guide": https://www.trojanbattery.com/tech-s...y-maintenance/
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Old 03-26-2020, 01:13 PM   #11
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Use caution -

The distilled water only needs to cover the plates, so don't overfill up to the fill ring bottoms - the level should be below, because water expands when hot. If it should overflow or boil-over with heat (normal operating heat or from a short or other electrical system problem), then you'll have acid water all over the place.

That said - I'm using AGM which require no filling & can't boil over, & others are using dry cell or Lithium (LiPo, etc.) which also can't boil over, but Lithium has other cautions.

Many battery & parts etc. shops sell Odyssey dry cell - which are also lighter than wet cell or AGM - as are Lithium. Interstate & Optima & other battery/parts shops now sell deep cycle AGM - i.e.: Absorbant Glass Mat - with gel instead of water for electrolyte, which weigh a tad less than water cell ones.

Cheers!
Tom
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Old 03-26-2020, 01:25 PM   #12
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I'm certain that overfilling a wet-cell battery by 1/8" will not be a problem. I live in the Tampa Florida area where my battery operates at over 100 degrees every day, I regularly see 120 degrees in mid-afternoon. I overfill my battery by 1/8", until water distorts, in the afternoon when the battery is fully charged. I have never had a problem with the battery spilling over from overfilling. I check my battery frequently and the water level is never higher than distorted. The water level typically settles down to under the plastic by the time I'm done filling all the cells. I do not worry about overflowing my 1/8" overfilled battery.
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Old 03-27-2020, 08:31 AM   #13
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The ring distortion was placed there on purpose, to indicate the fill level.

Pat
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