only Ni-Mh batteries, a better man than I

"john gurney" wrote in message
...

Just bought a Duracell battery charger yesterday for rechargeable AA and
AAA batteries. (model no CEF24UK)

The first disappointment was that it only charges *two* AA or two AAA at a
time. (usually chargers of this size charge four batteries at a time).

When I got home it specifically says in the instructions only to charge
Ni-mh batteries, and not any others.


If that is what the instructions say why would you expect them to be wrong?


--
Michael Chare

On Nov 30, 4:20*pm, "john gurney" wrote:
Just bought a Duracell battery charger yesterday for rechargeable AA and AAA
batteries. (model no CEF24UK)

The first disappointment was that it only charges *two* AA or two AAA at a
time. (usually chargers of this size charge four batteries at a time).

When I got home it specifically says in the instructions only to charge
Ni-mh batteries, and not any others.

So I rang the free phone number and said I've got a lot of the older Ni-Cd
batteries (like you have...right?) and would it do any damage to the
batteries or the charger to charge them?

Could I get a straight answer, could I hell.

I was very persistant, but she would not answer in a straight way. When I
asked if I could be transferred to a technical department, she said, "we
have 'all' the information".

All you staring blankly out of the window, waiting for something to
happen...
It's a free phone number...... 0800716434

The question I kept repeating was, will any damage be done to either the
charger or to the older ni-cd batteries, if charged up in this charger?

If you can get a straight answer from this women you're a better man than I.


You couldnt get a straight yes or no anwer because there is no
straight yes or no answer. To charge a nicd or nimh cell you need a
charge current that matches the cells (or is less), plus if the charge
is faster than 14hr rate you need some sort of auto charge shutoff.

Generally speaking, NiMH AA cells charge at much higher current than
AA nicads, so generally you cant stick nicads into a nimh charger -
but of course its not that simple.

I cant remember what old 450mAh nicads want, somewhere in teh region
of 40mA though. Your charger probably delivers far too much - it would
charge them, but the AAs would die very early.


NT

"john gurney" wrote in message
...

Just bought a Duracell battery charger yesterday for rechargeable AA and
AAA batteries. (model no CEF24UK)

The first disappointment was that it only charges *two* AA or two AAA at a
time. (usually chargers of this size charge four batteries at a time).

When I got home it specifically says in the instructions only to charge
Ni-mh batteries, and not any others.

So I rang the free phone number and said I've got a lot of the older Ni-Cd
batteries (like you have...right?) and would it do any damage to the
batteries or the charger to charge them?

Could I get a straight answer, could I hell.

Sounds like you've bought a bit of a pup, really.

It doesn't even charge particularly quickly (8-10 hours for 1800 mAh I
think).

The ones I use cost £10 with 4 free 2100 mAh NiMH AA batteries (or vice
versa), charge 4 AA, 4 AAA or 2 PP3, NiCd or NiMH, but take 19 hours for
2100 mAh NiMH AAs. I guess at that charge rate they won't damage anything.

(They are Uniross but Argos don't seem to sell anything comparable now.)

--
Max Demian

There are a lot of well educated idiots who won't know that factoid.
That said, I do believe you're right.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"A. Baum" wrote in message
news
NiCad and NmMh have different charge needs. Any idiot with a grain of
common sense knows this.

A. Baum wrote:
On Tue, 30 Nov 2010 16:22:14 +0000, Woody wrote:

"john gurney" wrote in message
...
Just bought a Duracell battery charger yesterday for rechargeable AA
and AAA batteries. (model no CEF24UK)

The first disappointment was that it only charges *two* AA or two AAA
at a time. (usually chargers of this size charge four batteries at a
time).

When I got home it specifically says in the instructions only to charge
Ni-mh batteries, and not any others.

So I rang the free phone number and said I've got a lot of the older
Ni-Cd batteries (like you have...right?) and would it do any damage to
the batteries or the charger to charge them?

Could I get a straight answer, could I hell.

I was very persistant, but she would not answer in a straight way. When
I asked if I could be transferred to a technical department, she said,
"we have 'all' the information".

All you staring blankly out of the window, waiting for something to
happen...
It's a free phone number...... 0800716434

The question I kept repeating was, will any damage be done to either
the charger or to the older ni-cd batteries, if charged up in this
charger?

If you can get a straight answer from this women you're a better man
than I.



The answer is no, it will not hurt the Ni-Cds provided the charge
current is within the range of the cells.

Uh, Nicads where charged mostly by time, NmMh by current sensing.

No. Voltage sensing. It works on both.

Its easier on NiCad since the voltage change is greater.

Delta peak chargesr that work on NiMh work on Nicad. The reverse *may*
not be true.

You
would want to monitor a nicad very closely in a NmMh charger if it didn't
complain and abort the charge in the first place. My Duracell charger
will not charge Nicad. Not even attempt to charge them.

blather. Learn the facts befor spouting.

willshak wrote:
Woody wrote the following:
"john gurney" wrote in message
...

Just bought a Duracell battery charger yesterday for rechargeable AA
and AAA batteries. (model no CEF24UK)

The first disappointment was that it only charges *two* AA or two AAA
at a time. (usually chargers of this size charge four batteries at a
time).

When I got home it specifically says in the instructions only to
charge Ni-mh batteries, and not any others.

So I rang the free phone number and said I've got a lot of the older
Ni-Cd batteries (like you have...right?) and would it do any damage
to the batteries or the charger to charge them?

Could I get a straight answer, could I hell.

I was very persistant, but she would not answer in a straight way.
When I asked if I could be transferred to a technical department, she
said, "we have 'all' the information".

All you staring blankly out of the window, waiting for something to
happen...
It's a free phone number...... 0800716434

The question I kept repeating was, will any damage be done to either
the charger or to the older ni-cd batteries, if charged up in this
charger?

If you can get a straight answer from this women you're a better man
than I.





The answer is no, it will not hurt the Ni-Cds provided the charge
current is within the range of the cells.

Then why is there a toggle switch on my 4 cell charger to switch to
either Ni-MH or Ni-Cad batteries?

slightly different delta peak probably.

I,e, crappy charger. Most will do either.

Steve Terry wrote:
"willshak" wrote in message
m...
Woody wrote the following:
"john gurney" wrote in message
...
snip
Then why is there a toggle switch on my 4 cell charger to switch to either
Ni-MH or Ni-Cad batteries?
Bill


I think it's because Ni-Mh charge at a slightly higher voltage?


irrelevant. Nickel hargers feed current and look for a voltage DROP as
the charged state is achieved. Chargers that are run this way limit
current, and switch off when they detect fully charged conditions. They
will charge as few or as many cells as they have supply voltage to force
current into.

Steve Terry

A. Baum wrote:
On Tue, 30 Nov 2010 16:20:33 +0000, john gurney wrote:

Just bought a Duracell battery charger yesterday for rechargeable AA and
AAA batteries. (model no CEF24UK)

The first disappointment was that it only charges *two* AA or two AAA at
a time. (usually chargers of this size charge four batteries at a time).

When I got home it specifically says in the instructions only to charge
Ni-mh batteries, and not any others.

So I rang the free phone number and said I've got a lot of the older
Ni-Cd batteries (like you have...right?) and would it do any damage to
the batteries or the charger to charge them?

Could I get a straight answer, could I hell.

I was very persistant, but she would not answer in a straight way. When
I asked if I could be transferred to a technical department, she said,
"we have 'all' the information".

All you staring blankly out of the window, waiting for something to
happen...
It's a free phone number...... 0800716434

The question I kept repeating was, will any damage be done to either the
charger or to the older ni-cd batteries, if charged up in this charger?

If you can get a straight answer from this women you're a better man
than I.

NiCad and NmMh have different charge needs. Any idiot with a grain of
common sense knows this.
No they dont. As people who have used them and charged them know.

They are VERY similar. Constant current and look for a drop in terminal
voltage and switch off then.

Only difference is the drop n a NiMh is a lot less, so it needs more
sensitive chargers.

Richard Tobin wrote:
In article ,
A. Baum wrote:

The question I kept repeating was, will any damage be done to either the
charger or to the older ni-cd batteries, if charged up in this charger?

If you can get a straight answer from this women you're a better man
than I.

NiCad and NmMh have different charge needs. Any idiot with a grain of
common sense knows this.

No straight answer from you either, then.


He only knows what every idiots knows, which is false anyway, so why boyher?

-- Richard

Andy Champ wrote:
On 30/11/2010 19:02, Man at B&Q wrote:
On Nov 30, 5:23 pm, "A. wrote:

NiCad and NmMh have different charge needs. Any idiot with a grain of
common sense knows this.

Any idiot with a grain of common sense (seems to rule you out) also
knows an intelligent charger can cope with both types.

MBQ

OK, handbags at dawn...

Before you two get into a real slagfest might I point out that those two
statements are not mutually exclusive?


They almost are.

No one makes a a NiCd only charger as NiMh chargers will charge either.

Andy