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
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.
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
Sounds the usual garbage formulated by some f****it droid without a clue.
so 24 hours times 5 is (approx) 100W
methinks someone misunderstood the the units.
tim
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 = 0.1kWhnow 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 f****it.
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.)
| |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.
Lol. Maybe if you add up all the chargers in the nation.
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
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
You may well be talking about GWh then...
-- JJ
I wouldn't say a 33Ah battery is the typical capacity of a car battery - more like
50 to 90 Ah...Nick
Ah well, probably only get as far as Neptune then.
Or Uranus?
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