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From: Ray O on 22 Nov 2009 21:56

"homepc" <wiebe008(a)gmail.com> wrote in message
news:hebg6j$c4u$1(a)news.eternal-september.org...
> I have a 2007 Corolla CE (Canadian made) with an original battery from
> Johnson Controls. Just a couple of weeks ago, the green eye disappeared.
> I use a Battery Tender Plus to maintain the battery and the charge is OK.
> I got the Toyota dealer to check the battery while I got my winter tires
> changed over a few days ago. They checked the water level and said it was
> within specs, and the battery power was more than adequate. They also
> mentioned that the green eye indicator does disappear for no reason on a
> few of their batteries.
>
> Has anyone had a similar problem and found a work around? I only drive
> during my weekends, and I rely on that green indicator to tell me if that
> battery is good or not. I was considering buying some kind of hardware
> battery tester but after looking on Google, I can only find really cheap
> ones or really expensive ones. Is there something I can plug into the
> cigarette lighter or the Battery Tender Plus pig tail to accurately
> measure the battery charge and strength under load without breaking the
> bank?
>
When you say that the green eye disappeared, I'm assuming that you mean that
the indicator is no longer green and not that the eye is physically missing
from the battery.

If the eye is clear and bright, the electrolyte level is low. If the eye is
dark or yellow, the electrolyte level is satisfactory but the state of
charge is low (low specific gravity).

If you decide to add water to the battery, distilled water is better than
tap water. Follow Johnson Control's directions carefully.

The indicator in your battery does not indicate the battery's ability to
hold a charge or its capacity for cranking. The green eye tells you that
the battery is charged, which you can also check with an inexpensive volt
meter.

A battery should be load tested to determine its condition, but if you are
only looking to duplicate the information that the eye gives, a volt meter
is all you need.
--

Ray O
(correct punctuation to reply)


From: Hachiroku ハチロク on 22 Nov 2009 23:29
On Sun, 22 Nov 2009 20:56:08 -0600, Ray O wrote:

>
> If the eye is clear and bright, the electrolyte level is low. If the eye
> is dark or yellow, the electrolyte level is satisfactory but the state of
> charge is low (low specific gravity).

What if it has a black eye? ;p



From: Ray O on 23 Nov 2009 00:12

"Hachiroku ????" <Trueno(a)e86.GTS> wrote in message
news:pan.2009.11.23.04.29.49.750304(a)e86.GTS...
> On Sun, 22 Nov 2009 20:56:08 -0600, Ray O wrote:
>
>>
>> If the eye is clear and bright, the electrolyte level is low. If the eye
>> is dark or yellow, the electrolyte level is satisfactory but the state of
>> charge is low (low specific gravity).
>
> What if it has a black eye? ;p
>
>
It couldn't hold its electrolyte ;-D
--

Ray O
(correct punctuation to reply)


From: larry moe 'n curly on 23 Nov 2009 13:16


homepc wrote:
>
> The car dealer checked the water level and it was within specs. I'm not so
> sure about using a voltmeter, doesn't the battery need to be tested under a
> load?

Why didn't the dealer also measure the specific gravity of each cell
when they were checking the water level? Because that's what the
green eye measures.

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