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100kWhs of phone charger power
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 |
100kWhs of phone charger power
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. |
100kWhs of phone charger power
"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 |
100kWhs of phone charger power
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100kWhs of phone charger power
"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 |
100kWhs of phone charger power
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.) |
100kWhs of phone charger power
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. |
100kWhs of phone charger power
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 |
100kWhs of phone charger power
"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 |
100kWhs of phone charger power
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 |
100kWhs of phone charger power
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 |
100kWhs of phone charger power
"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. |
100kWhs of phone charger power
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? |
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