battery service life

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Ron wrote:
> Is there any way to determine, using a voltage meter, where a battery
> is in its service life. Eg., to batteries starting to die charge up to
> lower voltage, etc.????

The best way is when they start giving your less service life.

--
Joseph Meehan

26 + 6 = 1 It's Irish Math

Archived from groups: rec.photo.digital (More info?)

I'm not talking about cycle time, but service life. Some batteries, like
NiMh's, from my experience, can have slightly varied cycles, depending
on how they were charged and how they are refreshed. I am more
interested in the actual longevity of lithium ions, which are more
stable in terms of cycle time I believe. Were I an expert I would not
have asked the question.

Joseph Meehan wrote:
> Ron wrote:
>
>>Is there any way to determine, using a voltage meter, where a battery
>>is in its service life. Eg., to batteries starting to die charge up to
>>lower voltage, etc.????
>
>
> The best way is when they start giving your less service life.
>

Archived from groups: rec.photo.digital (More info?)

When rechargeable die they tend to go slowly, so the best test is "really"
when you notice the battery just isn't lasting as long. There are too many
variables when it comes to determining true service life, and a volt meter
won't do it as it supplies no load to the battery.

You would have to supply a steady load on the battery till it dies and
compare it to a brand new one, then somehow calculate how much charge it
loses over time. And in some cases I've seen lithium ion batteries die on
the shelf over time.

There are a lot of sites on batteries on the Net. Google it.


"Ron" <rgood@netzero.com> wrote in message
news ArVd.3436$LN1.2788@fe04.lga...
> I'm not talking about cycle time, but service life. Some batteries, like
> NiMh's, from my experience, can have slightly varied cycles, depending on
> how they were charged and how they are refreshed. I am more interested in
> the actual longevity of lithium ions, which are more stable in terms of
> cycle time I believe. Were I an expert I would not have asked the
> question.
>
> Joseph Meehan wrote:
>> Ron wrote:
>>
>>>Is there any way to determine, using a voltage meter, where a battery
>>>is in its service life. Eg., to batteries starting to die charge up to
>>>lower voltage, etc.????
>>
>>
>> The best way is when they start giving your less service life.
>>
>

Archived from groups: rec.photo.digital (More info?)

"Joseph Meehan" <sligojoe_Spamno@hotmail.com> wrote in message
news:tupVd.793


> 26 + 6 = 1 It's Irish Math<


The IRA are the biggest crime syndicate in Europe - it's Irish Facts.

Archived from groups: rec.photo.digital (More info?)

On Thu, 3 Mar 2005 00:59:14 -0000, "epoxyresin" <stuck@thebottom.com>
wrote:

>
>"Joseph Meehan" <sligojoe_Spamno@hotmail.com> wrote in message
>news:tupVd.793
>
>
>> 26 + 6 = 1 It's Irish Math<
>
>
>The IRA are the biggest crime syndicate in Europe - it's Irish Facts.
>
>
Supported by American money.


Pete S.

www.derwentelec.clara.co.uk

Archived from groups: rec.photo.digital (More info?)

"Ron" <rgood@netzero.com> wrote in message
news:r9pVd.24344$6E7.17265@fe06.lga...
> Is there any way to determine, using a voltage meter, where a battery is
> in its service life. Eg., to batteries starting to die charge up to
> lower voltage, etc.????

Try this newsgroup, many battery experts are monitoring it:
sci.chem.electrochem.battery

Archived from groups: rec.photo.digital (More info?)

My Kodak CX 7300 quits when nicd batteries are at 1.10~1.05 volts
each.Nominal voltage of nicd batteries:1.25 (AFAIK).

--
Tzortzakakis Dimitriïs
major in electrical engineering, freelance electrician
FH von Iraklion-Kreta, freiberuflicher Elektriker
dimtzort AT otenet DOT gr
Ï "Markus L" <uo9oew@lnubb.pbz> Ýãñáøå óôï ìÞíõìá
news:ExYVd.118$826.8041@ns2.gip.net...
> "Ron" <rgood@netzero.com> wrote in message
> news:r9pVd.24344$6E7.17265@fe06.lga...
> > Is there any way to determine, using a voltage meter, where a battery is
> > in its service life. Eg., to batteries starting to die charge up to
> > lower voltage, etc.????
>
> Try this newsgroup, many battery experts are monitoring it:
> sci.chem.electrochem.battery
>
>