Nokia charger - plugged into wall 24/7

Is there any danger in plugging in my Nokia charger 24/7?

As I've plugged it in under my desk, it's a pain to reach under to switch it
on all the time...

Presumably, it only draws power when a phone is connected to it?

Si.

---

› See More: Nokia charger - plugged into wall 24/7

[email protected] declared for all the world to hear...
> Is there any danger in plugging in my Nokia charger 24/7?
>
> As I've plugged it in under my desk, it's a pain to reach under to switch it
> on all the time...
>
> Presumably, it only draws power when a phone is connected to it?

No, it draws power continuously as it is a transformer.
--
Regards
Jon

"Si" <[email protected]> wrote in message
news:[email protected]...
> Is there any danger in plugging in my Nokia charger 24/7?

Very dangerous, I plugged mine in when I got my Nokia 702 from mobileshop
(or were they called mistaproach then?) about 8 years ago. It hasn't
exploded yet, but you never know!

:-)

On Sun, 11 Dec 2005 20:46:40 -0000, Jon <[email protected]>
wrote:

>No, it draws power continuously as it is a transformer.

Switched mode???

[email protected] declared for all the world to hear...
> On Sun, 11 Dec 2005 20:46:40 -0000, Jon <[email protected]>
> wrote:
>
> >No, it draws power continuously as it is a transformer.
>
> Switched mode???

Whenever I've left chargers on for along period of time with no phone
connected they've always felt warm. This indicates to me that power is
being drawn (and wasted).
--
Regards
Jon

On Sun, 11 Dec 2005 20:13:33 -0000, "Si" <[email protected]>
wrote:

>Is there any danger in plugging in my Nokia charger 24/7?
>
>As I've plugged it in under my desk, it's a pain to reach under to switch it
>on all the time...
>
>Presumably, it only draws power when a phone is connected to it?

It will draw a small amount of power all the time, but it will be a
switch mode supply, so it will use a very small amount of power when
it is not in use.

All the power used is turned into heat, so you can assess how much
power is being used by feeling how hot it gets. Then compare that in
terms of a 5 watt light bulb.

I leave them plugged in.

--

Iain
the out-of-date hairydog guide to mobile phones
http://www.hairydog.co.uk/cell1.html
Browse now while stocks last!

On Sun, 11 Dec 2005 21:24:42 -0000, Jon <[email protected]>
wrote:

>Whenever I've left chargers on for along period of time with no phone
>connected they've always felt warm. This indicates to me that power is
>being drawn (and wasted).

Many of the older Nokia chargers were 'linear' and contained a
transformer and rectifier/regulation circuitry. They tended to run
warm even with no phone connected, much the same as a doorbell
'transformer'.

The newer Nokia chargers are 'switched mode' and are really quite
efficient. Unless you are pulling current from the output 'charging',
they are drawing a negligible amount of current on the input and tend
to run 'cold' in these circumstances.

HTH.

On Sun, 11 Dec 2005 21:24:42 -0000, Jon <[email protected]>
wrote:

>[email protected] declared for all the world to hear...
>> On Sun, 11 Dec 2005 20:46:40 -0000, Jon <[email protected]>
>> wrote:
>>
>> >No, it draws power continuously as it is a transformer.
>>
>> Switched mode???
>
>Whenever I've left chargers on for along period of time with no phone
>connected they've always felt warm. This indicates to me that power is
>being drawn (and wasted).
There are two forms of power loss in a transformer.
1. Iron Loss - no current needs to be drawn for this to occur.
2. I² R loss - current does need to be drawn for this.
In small, cheap transformers, where the load is low, (1) is more
noticable.

If the phone has stopped charging then the current taken will be
reduced but there will be some small losses in the stabiliser circuit
as well as the losses (see above) in the transformer.

The power consumption of these small chargers negligable. I leave 2 on
the go 24/7. Such chargers often have a heat fuse in them lest the
transformer overheats. Such 'fuses' are quite crude but they do work.
It wouldn't be wise to operate the transformer covered or near to to a
heat source. Otherwise the chances of a problem occurring are minimal.


Remove 'no_spam_' from email address.

In article <[email protected]>, Si says...
> Is there any danger in plugging in my Nokia charger 24/7?
>
> As I've plugged it in under my desk, it's a pain to reach under to switch it
> on all the time...
>
> Presumably, it only draws power when a phone is connected to it?
>
No. Draws power all the time. If you've no conscience about
contributing pointlessly to global warming, carry on.


--
Conor

"You're not married, you haven't got a girlfriend and you've never seen
Star Trek? Good Lord!" - Patrick Stewart, Extras.

[email protected] declared for all the world to hear...
> >Whenever I've left chargers on for along period of time with no phone
> >connected they've always felt warm. This indicates to me that power is
> >being drawn (and wasted).

> Many of the older Nokia chargers were 'linear' and contained a
> transformer and rectifier/regulation circuitry. They tended to run
> warm even with no phone connected, much the same as a doorbell
> 'transformer'.
>
> The newer Nokia chargers are 'switched mode' and are really quite
> efficient. Unless you are pulling current from the output 'charging',
> they are drawing a negligible amount of current on the input and tend
> to run 'cold' in these circumstances.
>
> HTH.

It does indeed, thanks. It was an older "cube" style Nokia charger which
I was recalling.
--
Regards
Jon

"Jon" <[email protected]> wrote in message
news:[email protected]...

> . It was an older "cube" style Nokia charger which
> I was recalling.

Slightly O/T, but my new NK phone I got free with the OVP Virgin upgrade
(Can't remember the number, but it is the 'squarer' of the two offered)
wouldn't charge with the old charger I have - had to use the new one!

Why would that be?


--

J B

On Mon, 12 Dec 2005 08:22:16 -0000, "J B" <[email protected]> wrote:

>Slightly O/T, but my new NK phone I got free with the OVP Virgin upgrade
>(Can't remember the number, but it is the 'squarer' of the two offered)
>wouldn't charge with the old charger I have - had to use the new one!

>Why would that be?

Slightly different output voltage?


Rufus.

Si wrote:
> Is there any danger in plugging in my Nokia charger 24/7?
>
> As I've plugged it in under my desk, it's a pain to reach under to switch it
> on all the time...
>
> Presumably, it only draws power when a phone is connected to it?
>
Depends on model of charger, what is yours?
There is no danger either way, I've had one plugged in for >5years

On Sun, 11 Dec 2005, Si wrote:

> Is there any danger in plugging in my Nokia charger 24/7?

And is the constant whistling noise normal on the 6230 chargers? I've
used three which all make a high pitched noise that pulsates while the
phone is charging and which is continuous once the phone has charged.

--
Chris

"OldBill" <[email protected]> wrote in message
news:[email protected]...
> Si wrote:
>> Is there any danger in plugging in my Nokia charger 24/7?
>>
>> As I've plugged it in under my desk, it's a pain to reach under to switch
>> it on all the time...
>>
>> Presumably, it only draws power when a phone is connected to it?
>>
> Depends on model of charger, what is yours?

ACP-7X

Si.