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zero volt battery - is it possible to dischargebattery to 0V

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eem2am

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zero volt battery

Hello,

Can a 12 V lead acid battery be discharged completely till it has zero volts on its output.......if it does...is it then dead/useless forever/broken ?
 

zero volt battery

Before cars had automatic shut offs, people frequently left the lights on all night. The battery was completely dead the next morning but after a jump start and drive the battery became charged and worked again. But not for long because much of its future life was wiped out.

If a lead-acid battery sits dead for a while then it becomes "sulfated" and cannot be charged again.
 

Re: zero volt battery

Hai Audio guru,
Do desulphators really work in normal circumstances ? Or does it work in case the battery is fully sulphated? Are the desulphators myth or reality?
 

zero volt battery

Car batteries last about 5 years if you take care.
Then you replace one that doesn't work.
Some people might throw away a "sealed' car battery that just needs some water to make it work for another year.

I have never had a car battery sit around discharged and sulfated so I don't know if a desulfator works.
 

zero volt battery

The voltage of batery is always constant. It is generated due to rules of electrochemistry and voltage itself is not affected by discharging. The point is that the internal resistance of the battery increases together with discharging. Sometimes this process is reversible (accumulators), and sometimes not. According to that the voltage at terminals of "completely" dead battery will vary with different voltmeters (they use different sense current- so the voltage drop at internal resistance will be different). On the other hand with the same multimeter, the voltage of "completely" dead batteries of samekind will vary with their capacity.

Best regards,

Micard
 

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