A leaflet that arrived with the electricity bill claims that our mobile
phone chargers will be sucking up 100kWh of electricity a day, whether
they are charging a phone or not.

What size battery would would suck up 100kWh a day? And who would I be
able to reach on the mobile phone?

Daniele

D.M. Procida wrote:

A leaflet that arrived with the electricity bill claims that our mobile
phone chargers will be sucking up 100kWh of electricity a day, whether
they are charging a phone or not.

What size battery would would suck up 100kWh a day? And who would I be
able to reach on the mobile phone?

Chargers do get warm if left plugged in but I find it hard to believe
this would amount to a tenth of a kilowatt in a day. Perhaps they have
selected the charger they are warning you about and it was an early
mobile phone charger circa 1980's.

"Weatherlawyer" writes:

Chargers do get warm if left plugged in but I find it hard to believe
this would amount to a tenth of a kilowatt in a day.

5W. Certainly modern chargers are quite cool so I agree with you.

When I suffered a disk crash a few weeks ago I borrowed a USB-IDE
adaptor and the nasty hot power supply with that took 7W with nothing
connected.

Jon

On Mon, 20 Nov 2006 21:07:09 +0000,
(D.M. Procida) wrote:

A leaflet that arrived with the electricity bill claims that our mobile
phone chargers will be sucking up 100kWh of electricity a day, whether
they are charging a phone or not.

Sounds the usual garbage formulated by some ****wit droid without a
clue.

What size battery would would suck up 100kWh a day? And who would I be
able to reach on the mobile phone?

Daniele

"Jonathan Schneider" wrote in message
...
"Weatherlawyer" writes:

Chargers do get warm if left plugged in but I find it hard to believe
this would amount to a tenth of a kilowatt in a day.

5W. Certainly modern chargers are quite cool so I agree with you.

so 24 hours times 5 is (approx) 100W

methinks someone misunderstood the the units.

tim

On Mon, 20 Nov 2006 21:07:09 +0000,
(D.M. Procida) wrote:

A leaflet that arrived with the electricity bill claims that our mobile
phone chargers will be sucking up 100kWh of electricity a day, whether
they are charging a phone or not.

What size battery would would suck up 100kWh a day? And who would I be
able to reach on the mobile phone?

Daniele

Picking up the nearest charger at hand, a Nokia - input rating 4.8VA -
call it 5W - that is on full load.
5W for 1 hour = 5Wh
5W for a day = 5 * 24 = 100Wh approx = 0.1kWh

now 1 unit = 1kWh

at 9p/unit cost = 0.9p/day

that's on full load.


--
Regards, Paul Herber, Sandrila Ltd. http://www.pherber.com/
Electrical for Visio http://www.electrical.sandrila.co.uk/

Paul Herber wrote:
On Mon, 20 Nov 2006 21:07:09 +0000,
(D.M. Procida) wrote:

A leaflet that arrived with the electricity bill claims that our mobile
phone chargers will be sucking up 100kWh of electricity a day, whether
they are charging a phone or not.

What size battery would would suck up 100kWh a day? And who would I be
able to reach on the mobile phone?

Daniele

Picking up the nearest charger at hand, a Nokia - input rating 4.8VA -
call it 5W - that is on full load.
5W for 1 hour = 5Wh
5W for a day = 5 * 24 = 100Wh approx = 0.1kWh

now 1 unit = 1kWh

at 9p/unit cost = 0.9p/day

that's on full load.

Don't take this the wrong way. I know I am prone to slap the ears of
the deserving but I think you had best read the original post, you
****wit.

Here is a clue: The OP is quoted at the top of your post (and I have
left it in the top of this one so you won't have to struggle.)

On 20 Nov 2006 13:35:13 -0800, "Weatherlawyer"
wrote:

|
|D.M. Procida wrote:
|
| A leaflet that arrived with the electricity bill claims that our mobile
| phone chargers will be sucking up 100kWh of electricity a day, whether
| they are charging a phone or not.
|
| What size battery would would suck up 100kWh a day? And who would I be
| able to reach on the mobile phone?
|
|Chargers do get warm if left plugged in but I find it hard to believe
|this would amount to a tenth of a kilowatt in a day.

Which is *100watthours per day* Maybe a person in the publicity department
who did not understand *kilo*?

About 4 watts seems about right to me.
--
Dave Fawthrop dave hyphenologist co uk Google Groups is IME the *worst*
method of accessing usenet. GG subscribers would be well advised get a
newsreader, say Agent, and a newsserver, say news.individual.net. These
will allow them: to see only *new* posts, a killfile, and other goodies.

D.M. Procida wrote:

A leaflet that arrived with the electricity bill claims that our mobile
phone chargers will be sucking up 100kWh of electricity a day, whether
they are charging a phone or not.

Lol. Maybe if you add up all the chargers in the nation.

What size battery would would suck up 100kWh a day? And who would I be
able to reach on the mobile phone?

Daniele

100kWh over say a 5hr charge is 20kW. At 12v that would be 1666A. For 5
hours means charging input of 8333Ah. If we allow 10% losses then
you're looking at a 7500Ah 12v battery. Compare that to your typical
33Ah car battery... its equivalent to 227 car batteries.

Where could you phone with that? Pluto maybe?


NT

"tim(yet another new home)" wrote in message
...

"Jonathan Schneider" wrote in message
...
"Weatherlawyer" writes:

Chargers do get warm if left plugged in but I find it hard to believe
this would amount to a tenth of a kilowatt in a day.

5W. Certainly modern chargers are quite cool so I agree with you.

so 24 hours times 5 is (approx) 100W

methinks someone misunderstood the the units.

Multiply that by 365 days (0.1kWh x 365) = 36.5kWh

If you have three or more chargers in the house (two mobile phones and a
couple of DECT handsets) and you are looking at well over 100kWh

That is per *year* though, and that is where the leaflet gets things mixed
up. Swap *day* for *year* and it makes perfect sense.

-- JJ

wrote in message
oups.com...
D.M. Procida wrote:

A leaflet that arrived with the electricity bill claims that our mobile
phone chargers will be sucking up 100kWh of electricity a day, whether
they are charging a phone or not.

Lol. Maybe if you add up all the chargers in the nation.

You may well be talking about GWh then...

-- JJ

100kWh over say a 5hr charge is 20kW. At 12v that would be 1666A. For 5
hours means charging input of 8333Ah. If we allow 10% losses then
you're looking at a 7500Ah 12v battery. Compare that to your typical
33Ah car battery... its equivalent to 227 car batteries.

Where could you phone with that? Pluto maybe?


NT


I wouldn't say a 33Ah battery is the typical capacity of a car battery -
more like
50 to 90 Ah...

Nick

"Nick" wrote in message
...
100kWh over say a 5hr charge is 20kW. At 12v that would be 1666A. For 5
hours means charging input of 8333Ah. If we allow 10% losses then
you're looking at a 7500Ah 12v battery. Compare that to your typical
33Ah car battery... its equivalent to 227 car batteries.

Where could you phone with that? Pluto maybe?


NT


I wouldn't say a 33Ah battery is the typical capacity of a car battery -
more like
50 to 90 Ah...

Ah well, probably only get as far as Neptune then.

On 2006-11-25 11:15:59 +0000, "Jason" said:


"Nick" wrote in message
...
100kWh over say a 5hr charge is 20kW. At 12v that would be 1666A. For 5
hours means charging input of 8333Ah. If we allow 10% losses then
you're looking at a 7500Ah 12v battery. Compare that to your typical
33Ah car battery... its equivalent to 227 car batteries.

Where could you phone with that? Pluto maybe?


NT


I wouldn't say a 33Ah battery is the typical capacity of a car battery
- more like
50 to 90 Ah...

Ah well, probably only get as far as Neptune then.

Or Uranus?