On Mon, 17 Feb 2014 21:48:48 -0600, Jon Elson
wrote:

Gunner Asch wrote:



The odd thing...

I have it sitting in my sailboat, hooked to the am/fm stereo so Ive
got music while I work. When I disconnected the charger...the power
strobed from 16.5-9.1 volts about 5 times. Not the Charger power..but
the BATTERY power. WTF?
It strobed the stereo..and then the stereo dropped out (its ok, not
hurt)

So I disconnected the stereo. Put meter leads on the battery, and
disconnected one leg of the charger. And the damned battery will
strobe from about 9 volts to 16 volts..about a half second per
"pulse:. for about 3 seconds..and then drop to 9+ volts.
Oh oh! Lead acid batteries that have been allowed to self discharge
badly get warped plates. This can cause internal shorts, or break
the connections between cells. If the interconnection between the
cells goes bad it can get very flaky, With the charger on, it will
go to over-voltage when the connection opens, and then go back to
charging the string of cells, with maybe 2 that are shorted, giving
you your 9 volts. Watch out, when batteries are in this state they can
explode. Don't ask how I know THAT little bit, let's just say it
had to be the loudest noise I've ever heard indoors.

(You get this fizzing discharge around the bad interconnect,
it gets hot, electrolysis fills the battery with H2 and O2, and then
BOOM!)

Jon


Thanks for that!

Gunner

--
"You guess the truth hurts?

Really?

"Hurt" aint the word.

For Liberals, the truth is like salt to a slug.
Sunlight to a vampire.
Raid® to a cockroach.
Sheriff Brody to a shark
Bush to a Liberal

The truth doesn't just hurt. It's painful, like a red hot poker shoved
up their ass. Like sliding down a hundred foot razor blade using their
dick as a brake.

They HATE the truth."


---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com

Gunner Asch wrote:
On Mon, 17 Feb 2014 21:48:48 -0600, Jon Elson
wrote:

Gunner Asch wrote:



The odd thing...

I have it sitting in my sailboat, hooked to the am/fm stereo so
Ive got music while I work. When I disconnected the
charger...the power strobed from 16.5-9.1 volts about 5 times.
Not the Charger power..but the BATTERY power. WTF?
It strobed the stereo..and then the stereo dropped out (its ok,
not hurt)

So I disconnected the stereo. Put meter leads on the battery, and
disconnected one leg of the charger. And the damned battery will
strobe from about 9 volts to 16 volts..about a half second per
"pulse:. for about 3 seconds..and then drop to 9+ volts.
Oh oh! Lead acid batteries that have been allowed to self discharge
badly get warped plates. This can cause internal shorts, or break
the connections between cells. If the interconnection between the
cells goes bad it can get very flaky, With the charger on, it will
go to over-voltage when the connection opens, and then go back to
charging the string of cells, with maybe 2 that are shorted, giving
you your 9 volts. Watch out, when batteries are in this state they
can explode. Don't ask how I know THAT little bit, let's just say
it
had to be the loudest noise I've ever heard indoors.

(You get this fizzing discharge around the bad interconnect,
it gets hot, electrolysis fills the battery with H2 and O2, and then
BOOM!)

That explains the oscillation, from the plate expanding. I wish they still
made Christmas lights like that. The LED **** isn't truly random.


--

Reply in group, but if emailing, add a zero and remove the last word.