Re: How to define a "dead" battery technically?

Jim Higgins <invalid@xxxxxxxxxxxxxxx> wrote:
On 16 Feb 2006 22:51:12 -0800, "sboy" <joecmlam@xxxxxxxxx> wrote:

Hi every battery lover,

Is it just as simple as a dead battery stays at 0V? What is the
definition of a "dead" battery technically? Many thanks!

A battery is "dead" when it's unable to deliver 80% of its rated
capacity.

Umm, no.

A battery is dead, when it is no longer - in the users opinion - capable
of delivering the performance required of it, that it once did.

For example, if you're using a car battery in a car, then it's pretty
much failed if it will no longer supply around a hundred amps at over
about 8V.

If you're using the same battery as a buffer for a solar panel, and
running a 1A light from it 3 hours a day, you won't notice any
performance difference whatsoever at this point.

Conversely, if the battery starts self-discharging at .5A, you might not
notice it in a regularly used car, but it'd be dead in a couple of days
in a solar app.
.

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