The Truth about those phone chargers...

Yep the newer ones is not really a problem. We actually did accurate test on them the other day en Energy System class. Can't remember the exsact power used, but it was really neglible.

The problem really is with the older chargers, they weren't that effecient at all. The general rule of thumb is, if anything gets noticeble cooler or warmer than room temperature while not in use plug it out. Not really rocket science.
 
GreenPunkt said:
If it's not charging anything, why would it get warm?
Click to expand...

There is circuits in the charger that is used as a switch and when you plug in you phone the charger switches on. On older chargers these circuits weren't optimized at all and used almost used the same amount of power even if your phone wasn't charging. That's why it will get hot energy converted into head since nothing else is happening. That's where this whole thing about unplug your chargers started.
 
And this is what I said all along, but I was ignored.

Actually if any of the lot who spread these stories knew the theory behind the electronics in there you'll see why the current consumed with no load is negligble.
 
GreenPunkt said:
If it's not charging anything, why would it get warm?
Click to expand...

The older power supplies and chargers used an iron core transformer to step the voltage down then rectify it (DC) and then use it for whatever, whereas the new ones are what's called switchmode power supplies that rectify the 220 Vac mains and switch this on the primary of a small ferrite core transformer - this makes it much lighter and compact and able to work at a wide input voltage (90 ~ 240 Vac) - these new type do not get warm and their standby power consumption is negligible.

The older ones got warm and consumed power due to the losses of the iron core transformer even when not in use but just plugged into the mains.
 
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How much will this make a difference on a monthly bill? R50 if its plugged in 24/7 ?
 
SlyFly said:
How much will this make a difference on a monthly bill? R50 if its plugged in 24/7 ?
Click to expand...

Cell C had it on their bill the other day.

Something along the lines of

"If our 1.6 million customers unplug their chargers when not in use, that power can generates X (think it was 20) amount of resident blocks."

Like I side, I'm not sure about the figures, but it was a lot of power being saved.
 
SlyFly said:
How much will this make a difference on a monthly bill? R50 if its plugged in 24/7 ?
Click to expand...

Calculating based on a phone chargers no-load consumption with it being plugged in 24 hours a day for 30 days would give you about 0.9 kWh (0.03W X 30).
Cost for the month based on 46,34 c/kWh is about R0.42
http://www.int.iol.co.za/index.php?set_id=1&click_id=13&art_id=qw1151460540647B214



Reducing the no-load energy demand of chargers
In the decade up to 2006, Nokia reduced the no-load demand by 70% in average and 90% in the best chargers. The target is to reduce this by a further 50% (from 2006 level) by 2010. The high efficiency charger introduced with the Nokia 3110 Evolve uses just 0.03W. This is 94% below the EPA’s Energy Star requirement.
 
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Frankie said:
Calculating based on a phone chargers no-load consumption with it being plugged in 24 hours a day for 30 days would give you about 0.9 kWh (0.03W X 30).
Cost for the month based on 46,34 c/kWh is about R0.42
http://www.int.iol.co.za/index.php?set_id=1&click_id=13&art_id=qw1151460540647B214



Reducing the no-load energy demand of chargers
In the decade up to 2006, Nokia reduced the no-load demand by 70% in average and 90% in the best chargers. The target is to reduce this by a further 50% (from 2006 level) by 2010. The high efficiency charger introduced with the Nokia 3110 Evolve uses just 0.03W. This is 94% below the EPA’s Energy Star requirement.
Click to expand...

Wow thats really interesting
 
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