The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that same
technology.

The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

The cynic in me thinks Supermarkets place these "special" DECT
batteries in the phone isle just so they can charge a premium.


I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that same
technology.

Yes. Can you even buy NiCads on the High St?


--
Graham.

%Profound_observation%

On 07/02/2019 12:52, NY wrote:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones
are starting to lose their ability to hold their charge: they indicate
full charge but the phone cuts out with "low battery" within a few
minutes of being taken off the charging base station, especially if used
on speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that
same technology.

As long as you keep the same technology you should be OK

Be very careful subsituting NiMh for NiCd.

It may overcharge and split

Never switch nickel to lithium




--
€œA leader is best When people barely know he exists. Of a good leader,
who talks little,When his work is done, his aim fulfilled,They will say,
€œWe did this ourselves.€�

ۥ Lao Tzu, Tao Te Ching

On 07/02/2019 13:03, Graham. wrote:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

The cynic in me thinks Supermarkets place these "special" DECT
batteries in the phone isle just so they can charge a premium.


I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that same
technology.

Yes. Can you even buy NiCads on the High St?


sort of.

Not high street but they are available,.


--
Climate Change: Socialism wearing a lab coat.

NY wrote on 07/02/2019 :

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

Go for the largest capacity you can find, but be wary that some sellers
claim a larger capacity than actual. I just bought cheap ebay cells and
they have been fine for the past couple of years.


I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that same
technology.

Yes, the different type have differing charging requirements.

"NY" Wrote in message:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that same
technology.



I believe it's because they are always on their pedestals being
(over) charged that the NiMH rechargeable batts die young. I've
just replaced another set in a cordless handset & am not leaving
it on the charging stand, only when it needs a charge...
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

On 07/02/2019 13:02, Jim K.. wrote:
"NY" Wrote in message:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that same
technology.



I believe it's because they are always on their pedestals being
(over) charged that the NiMH rechargeable batts die young. I've
just replaced another set in a cordless handset & am not leaving
it on the charging stand, only when it needs a charge...

Ours (Siemens c47) are always in their cradles when not being used but
the original Chinese NiMH batteries are still OK after nearly 9 years.
Maybe some phones have better charging control than others.

On Thu, 7 Feb 2019 12:52:46 -0000, "NY" wrote:

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr.

No problem...

I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

Correct. Some phones like to have the batteries charged once and then run down
to zero-dead-nothing, as this calibrates the charge meter. Do it, because even
if it doesn't do this, doing it won't harm anything...

I will go for branded (eg Duracell) rechargeable batteries.

Good choice.

I presume that if the original batteries are NiMH, I should go for that same
technology.

Yup.


Thomas Prufer

Wrote in message:
On 07/02/2019 13:02, Jim K.. wrote:
"NY" Wrote in message:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that same
technology.



I believe it's because they are always on their pedestals being
(over) charged that the NiMH rechargeable batts die young. I've
just replaced another set in a cordless handset & am not leaving
it on the charging stand, only when it needs a charge...

Ours (Siemens c47) are always in their cradles when not being used but
the original Chinese NiMH batteries are still OK after nearly 9 years.
Maybe some phones have better charging control than others.



My Siemens Gigaset x4 have all suffered the OPs ailment.

--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

"Jim K.." wrote in message
...
My Siemens Gigaset x4 have all suffered the OPs ailment.

The BT 8500 set that we have replaces some Gigaset phones which had
horrendous problems with failing to answer when you picked the phone off its
rest and pressed the answer button if it failed to auto-answer, and with
batteries dying with no warning. It was Gigaset support who first tried to
tell me that my problems were due to fitting higher-capacity batteries to
replace the ones that they had supplied (which sounds like fluent ********)
and anyway it ignores the fact that the replacement batteries were only
necessary because the supplied ones were unpredictable.

The BT handsets are fine as long as you don't turn on the speakerphone, then
they drain quickly - I get about 30 mins before I get the dreaded
bleep-bleep followed by cutting off within a few seconds: it is a race to
turn off speakerphone and/or to find another handset. I wish there were more
DECT phones with either bluetooth adaptors or a 3.5 mm jack, so you could
use a headset rather than speakerphone when on a phone call while at a
computer (I do a lot of telephone support for my parents' various computer
problems and for a website that they manage, via Teamviewer).

In article ,
wrote:
Ours (Siemens c47) are always in their cradles when not being used but
the original Chinese NiMH batteries are still OK after nearly 9 years.
Maybe some phones have better charging control than others.

Yes- easily checked if they are hot even after being left charging for
ages.

--
*When I'm not in my right mind, my left mind gets pretty crowded *

Dave Plowman London SW
To e-mail, change noise into sound.

Yes I've done this. You are lucky a few years ago they were tripple as in a
little cage with a plug that were sealed and the replacements were nearly
the cost of the phone.
However I do feel that the way they charge shortens their lives.
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"NY" wrote in message
o.uk...
The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that
same technology.

The other thing is to do away with the charger find a charger that does the
batteries one at a time and keep two sets on the go, one in the phone and
one in the charger.
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Jim K.." wrote in message
o.uk...
"NY" Wrote in message:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that
same
technology.



I believe it's because they are always on their pedestals being
(over) charged that the NiMH rechargeable batts die young. I've
just replaced another set in a cordless handset & am not leaving
it on the charging stand, only when it needs a charge...
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

On 07/02/2019 14:04, Thomas Prufer wrote:
Correct. Some phones like to have the batteries charged once and then run down
to zero-dead-nothing, as this calibrates the charge meter. Do it, because even
if it doesn't do this, doing it won't harm

I doint think so.

Nickel chargers simply run a constant current through until they see a
voltage DROP. Then tghe switch back to trickle.

Lithoum cahrgers charge to the correct voltage and stop

None measire the actual charge delivered. Unless like me you have a
fancy model plane one.


--
"The great thing about Glasgow is that if there's a nuclear attack it'll
look exactly the same afterwards."

Billy Connolly

On Thu, 7 Feb 2019 12:52:46 -0000, "NY" wrote:

The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that same
technology.

I acquired a Gigaset DECT phone on Freecycle, and the Chinese
batteries exhibited the OP's problem. I replaced them with Duracell
rechargeable "precharged" cells which are fine. They have twice the
stated capacity of the originals.

However the battery charge symbol indicated empty when I installed
them, and only showed full when the handset had been on charge. This
makes me think the indicator only shows the calculated value, not the
actual value. So when it shows empty perhaps it's only half empty, but
I haven't tried to find out.
--
Dave W

On 07/02/2019 12:52, NY wrote:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones
are starting to lose their ability to hold their charge: they indicate
full charge but the phone cuts out with "low battery" within a few
minutes of being taken off the charging base station, especially if used
on speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that
same technology.

Yup, same chemistry, but higher capacity should be fine.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

"NY" wrote in message
o.uk...
The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr.

My Panasonic KX-TCD735ALMs don’t care tho they
do say not to use 750 mAhr.

I presume the phone will still charge them at its standard rate (though it
may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that
same technology.

Mine does say to only use NiMH or NiCad, I use eneloops.

On Thu, 07 Feb 2019 17:20:05 +0000, Dave W wrote:

However the battery charge symbol indicated empty when I installed
them, and only showed full when the handset had been on charge. This
makes me think the indicator only shows the calculated value, not the
actual value. So when it shows empty perhaps it's only half empty, but
I haven't tried to find out.

Try leaving the phone off the charger until it's completely empty, and only then
recharge it.

It's in the directions for at least some Gigaset handsets as "first charge"
instructions.


Thomas Prufer

On Thu, 7 Feb 2019 16:59:11 +0000, The Natural Philosopher
wrote:

I doint think so.

From several Gigaset manuals:

"Initial charging and discharging of the batteries
"The correct charge status can only be displayed if the batteries are first
fully charged and discharged.
"Place the handset in the charger for 7 hours.
"Then remove the the handset from the charger, (...) and do not put it on the
charge runtil the batteries are fully discharged."


Thomas Prufer

Brian Gaff wrote

Yes I've done this. You are lucky a few years ago they were tripple as in
a little cage with a plug that were sealed and the replacements were
nearly the cost of the phone.

Not lucky, I made sure I bought one that used standard AA rechargeable.

However I do feel that the way they charge shortens their lives.

Not with the best of them. The originals didn’t last forever
but the eneloops I replaced them with have done so.

"NY" wrote in message
o.uk...
The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that
same technology.

On 07/02/2019 12:52, NY wrote:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones
are starting to lose their ability to hold their charge: they indicate
full charge but the phone cuts out with "low battery" within a few
minutes of being taken off the charging base station, especially if used
on speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that
same technology.

I changed mine ages ago for 1.2Ah AAs and they've been fine.

Bill

In article ,
writes
On 07/02/2019 13:02, Jim K.. wrote:
"NY" Wrote in message:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones are
starting to lose their ability to hold their charge: they indicate full
charge but the phone cuts out with "low battery" within a few minutes of
being taken off the charging base station, especially if used on
speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

I will go for branded (eg Duracell) rechargeable batteries.

I presume that if the original batteries are NiMH, I should go for that same
technology.


I believe it's because they are always on their pedestals being
(over) charged that the NiMH rechargeable batts die young. I've
just replaced another set in a cordless handset & am not leaving
it on the charging stand, only when it needs a charge...

Ours (Siemens c47) are always in their cradles when not being used but
the original Chinese NiMH batteries are still OK after nearly 9 years.
Maybe some phones have better charging control than others.
Same here. I've only changed ours once and that was after a similar time
period. I have however replaced one handset as the charger proved to be
faulty. Got a replacement 2nd hand on ebay from Holland.
--
bert

On Thu, 07 Feb 2019 19:24:44 +0100, Thomas Prufer
wrote:

On Thu, 07 Feb 2019 17:20:05 +0000, Dave W wrote:

However the battery charge symbol indicated empty when I installed
them, and only showed full when the handset had been on charge. This
makes me think the indicator only shows the calculated value, not the
actual value. So when it shows empty perhaps it's only half empty, but
I haven't tried to find out.

Try leaving the phone off the charger until it's completely empty, and only then
recharge it.

It's in the directions for at least some Gigaset handsets as "first charge"
instructions.


Thomas Prufer

Of course that's the way to do it, but I don't want to, because
"completely empty" means I can't answer it without being liable to be
cut off unexpectedly. When installed the cells were full voltage and
shouldn't have needed charging at all, yet the indicator said empty.
--
Dave W

On 07/02/2019 18:33, Thomas Prufer wrote:
On Thu, 7 Feb 2019 16:59:11 +0000, The Natural Philosopher
wrote:

I doint think so.

From several Gigaset manuals:

"Initial charging and discharging of the batteries
"The correct charge status can only be displayed if the batteries are first
fully charged and discharged.
"Place the handset in the charger for 7 hours.
"Then remove the the handset from the charger, (...) and do not put it on the
charge runtil the batteries are fully discharged."


That isnt what you said.

You implied that the charger NEEDED to know the state of charge to WORK.

In fact it does not. It only needs to know it to be able to say how
charged they actuially are.



Thomas Prufer



--
Any fool can believe in principles - and most of them do!

NY presented the following explanation :
The BT 8500 set that we have replaces some Gigaset phones which had
horrendous problems with failing to answer when you picked the phone off its
rest and pressed the answer button if it failed to auto-answer, and with
batteries dying with no warning.

I have a set of those and no problems like that - though like yours the
original cells were unpredictable, so I soon replaced them with new.

We sometimes find it fails to connect, to charge, when dropped in the
cradle - a nudge sorts that.

On Thu, 07 Feb 2019 21:11:32 +0000, Dave W wrote:

Of course that's the way to do it, but I don't want to, because
"completely empty" means I can't answer it without being liable to be
cut off unexpectedly. When installed the cells were full voltage and
shouldn't have needed charging at all, yet the indicator said empty.

The way around that is to fully discharge the batteries...

A second phone, maybe wired, for the few hours between empty and charged?

Thomas Prufer

On 07/02/2019 12:52, NY wrote:
The bog standard rechargeable batteries (750 mAhr) in our DECT phones
are starting to lose their ability to hold their charge: they indicate
full charge but the phone cuts out with "low battery" within a few
minutes of being taken off the charging base station, especially if used
on speakerphone.

Is there a problem with replacing them with batteries that can hold more
charge ie 750 mAhr. I presume the phone will still charge them at its
standard rate (though it may take longer to charge them).

So long as you use batteries with the same chemistry as the originals
then there should not be a problem. Phone makers just use the cheapest
(ie low capacity) ones that can reasonably get away with.

Some phone chargers are as dumb as a rock and continue to charge already
charged batteries eventually killing them (or rather making them
unwilling to discharge anything like their full capacity when required).

I will go for branded (eg Duracell) rechargeable batteries.

That is a very bad idea. The *only* batteries I have had leak on me in
the recent past have all been genuine Duracell. You can find threads
bemoaning the problem in s.e.design. Panasonic or Everyready are still
reliable battery brands. Aldi/Lidls were good and at bargain prices in
the past - they are less so now and more variable.

I presume that if the original batteries are NiMH, I should go for that
same technology.

Not should *MUST* - likewise if they are NiCad replace with NiCad.
NiCads tend to suffer memory effect and so lose capacity quickly.

--
Regards,
Martin Brown

The Natural Philosopher wrote:

None measire the actual charge delivered. Unless like me you have a
fancy model plane one.

Several less-fancy chargers measure the charge they have delivered, but
aren't controlled by the charge.