Electrical Engineering - I can't wait that long to charge the batteries!

Author

I can't wait that long to charge the batteries!

Caspian

2007-07-26, 9:25 am

Some domestic appliances come with rechargeable cells that need charging
for many hours before their first use.

For example, I have a Panasonic DECT phone with two AAA NiMH cells which
needs charging for 7 hours.

But maybe you can't wait that long for some reason and you simply
"must" use the appliance!

How much would cell life be reduced if such an appliance is used after,
say, only 30 to 60 minutes of charging instead of the 7 hours?

Lostgallifreyan

2007-07-26, 9:25 am

Caspian <zero@nomail.com> wrote in
news:46a87ac5$0$19518$8f2e0ebb@news.shared-secrets.com:

> Some domestic appliances come with rechargeable cells that need charging
> for many hours before their first use.
>
> For example, I have a Panasonic DECT phone with two AAA NiMH cells which
> needs charging for 7 hours.
>
> But maybe you can't wait that long for some reason and you simply
> "must" use the appliance!
>
> How much would cell life be reduced if such an appliance is used after,
> say, only 30 to 60 minutes of charging instead of the 7 hours?
>

First, take care that NiMH and NiCd are different, Nicads have a 'memory
effect' that makes this unwise. You've got Nickel metal hydrides, so you
can do it. Most of the charge goes in during the first part of the charge,
the increase isn't linear.

That means you can grab a useful charge in the first hour of charge, but to
make sure the full charge is properly applied, use up that charge before
trying to recharge, then give it the full time. Don't try to guess how much
is needed if you charge from empty for an hour, use for half an hour, and
such, you'll probably overcharge the batteries.

In short, you can get a lot of capacity from a charge of as little as one
third of the time for full charge, but whatever you do, always start the
charge on a freshly discharged MiMH battery so you know where you are.

Spurious Response

2007-07-27, 3:25 am

Top posted just this once...

AT LAST! SOMEONE THAT SCTUALLY KNOW THE PROPER TERMS FOR THE DEVICES HE
USES!

Thanks dude... I needed that.

There, english TARDS.

Put that in you enema bag and shove it up your asses!

On Thu, 26 Jul 2007 12:01:43 +0100, Caspian <zero@nomail.com> wrote:

>Some domestic appliances come with rechargeable cells that need charging
>for many hours before their first use.
>
>For example, I have a Panasonic DECT phone with two AAA NiMH cells which
>needs charging for 7 hours.
>
>But maybe you can't wait that long for some reason and you simply
>"must" use the appliance!
>
>How much would cell life be reduced if such an appliance is used after,
>say, only 30 to 60 minutes of charging instead of the 7 hours?

Wilscombe

2007-07-27, 9:25 am

On Jul 27, 5:10 am, Spurious Response
<SpuriousRespo...@cleansignal.org> wrote:
> Top posted just this once...
>
> AT LAST! SOMEONE THAT SCTUALLY KNOW THE PROPER TERMS FOR THE DEVICES HE
> USES!
>
> Thanks dude... I needed that.
>
> There, english TARDS.
>
> Put that in you enema bag and shove it up your asses!
>
>
>
> On Thu, 26 Jul 2007 12:01:43 +0100, Caspian <z...@nomail.com> wrote:
>
>
>
>
> - Show quoted text -

A simple solution might be to use standard disposable AAA batteries
until the others are fully charged. There might be a problem if these
batteries are left in for a long time but I imagine the risk would be
minimal. Most manufacturers have Helplines who could advise.
Can anyone tell me what a "Tard" is,let alone an English one? I
imagine "Spurious Response" is a Redneck? Curious breed!

clifto

2007-07-27, 5:25 pm

Wilscombe wrote:
> Can anyone tell me what a "Tard" is,let alone an English one? I
> imagine "Spurious Response" is a Redneck? Curious breed!

It's short for "retard", which itself is shorthand for "mentally retarded
person".

--
"Liberals used to be the ones who argued that sending U.S. troops abroad
was a small price to pay to stop genocide; now they argue that genocide
is a small price to pay to bring U.S. troops home."
-- Jonah Goldberg

Spurious Response

2007-07-28, 3:25 am

On Fri, 27 Jul 2007 13:30:21 -0500, clifto <clifto@gmail.com> wrote:

>Wilscombe wrote:
>
>It's short for "retard", which itself is shorthand for "mentally retarded
>person".

Nope. The term retard can be referring to such a person, but it also
means taking a step back.

Take some techno-person, watch him state something utterly ludicrous,
and just like the "retarded" timing on an automobile, viola! We have
someone that is acting retarded.

They are rampant in Usenet.

Jerry G.

2007-07-28, 5:25 pm

Have several sets of batteries with external chargers. While you are
gabbing away on your phone, you can be having some batteries on charge.
When the batteries in use are running low, you do a battery swap.
Calculate the number of sets of batteries and chargers you will need,
and then go for it!

By the way it sounds, I would guess you will need three sets of
batteries and chargers.

--

Jerry G.

"Caspian" <zero@nomail.com> wrote in message
news:46a87ac5$0$19518$8f2e0ebb@news.shared-secrets.com...
Some domestic appliances come with rechargeable cells that need charging
for many hours before their first use.

For example, I have a Panasonic DECT phone with two AAA NiMH cells which
needs charging for 7 hours.

But maybe you can't wait that long for some reason and you simply
"must" use the appliance!

How much would cell life be reduced if such an appliance is used after,
say, only 30 to 60 minutes of charging instead of the 7 hours?

Spurious Response

2007-07-29, 9:25 am

On Sat, 28 Jul 2007 15:05:24 -0400, "Jerry G."
<jerryg50@NOSPAMhotmail.com> wrote:

>Have several sets of batteries with external chargers.

No. You have several cell in external charging devices, which been
improperly monikered as "battery" chargers.

> While you are
>gabbing away on your phone, you can be having some batteries on charge.

No. You have some cells on charge.

>When the batteries in use are running low, you do a battery swap.

When the cells run low, you should swap ALL of the CELLS that comprise
your device's BATTERY, as swapping only those you perceive as being
drained is asking for problems.

>Calculate the number of sets of batteries and chargers you will need,
>and then go for it!

Unrelated stupid shit.

>By the way it sounds, I would guess you will need three sets of
>batteries and chargers.

Unrelated stupid shit.

Lostgallifreyan

2007-07-29, 9:25 am

Spurious Response <SpuriousResponse@cleansignal.org> wrote in
news:gvnoa3loa2ollhdp4747j1lf1e5tpqcces@4ax.com:

> On Sat, 28 Jul 2007 15:05:24 -0400, "Jerry G."
> <jerryg50@NOSPAMhotmail.com> wrote:

> A snipped, and annoying, lecture on the distinction between 'cell' and
> 'battery'.

If it excercises you so much, instead of lambasting someone just because
you can, write a letter to the Times or something. Submit an article to a
journal. Or at least write to every maker of commercial gear who
transgresses. There's more to understanding something than getting the
exact words right. Sure it's misleading, but most people know how to avoid
the problems. If you really want to evangelise on this point, get a job
writing manuals for a major company, as that's the way you'll most likely
shape public usage of these terms. You certainly won't reach them this way.

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