a little lesson about chargers
The thing is that whenever a charging device is plugged into a wall socket with the power switch on, regardless of whether it is plugged into a device for charging or not - it WILL still use electricity......The electricity it uses is transformed into heat
A Charger/Transformer basically consists of 2 tightly wound coils of wire, isolated from each other, to create a step down of voltage by use of 'magnectic inductor principles'.
Now a Coil of wire that has a voltage running through it, will not only produce a magnectic field - it will also produce heat/light (those of us old enough may remember 'electric bar fires', these are basically one half of a transformer). Now modern day transformers/chargers are more efficient than the good old days - so the amount of heat it produces is very little - but it is still energy used.
When you are charging a device (3DS or whatever) you are putting a higher 'load' onto the transformer (on the other 'coils') which heats up the iron core even more than normal - & that is why transfomers can get 'warmer' after chargingThis is quite correct, except I have some points to add:
- All wall warts use electricity all the time, yes, but the question is how much. If I had to hazard a guess based on absolutely no evidence, I would say no more than what it takes to drive your average indicator LED. Not all of the electricity is lost to heat, though; some of it leaks out to ground.
- Transformers don't produce light on their own, except through electrical arcing which isn't normal.
- "one half of a transformer" is just a regular inductor, which would quickly saturate under DC current and would have current that lags voltage under AC.
- Most importantly, I can virtually guarantee you that the stock 3DS charger is a switched-mode power supply, and considering the wattages involved are so small, I doubt there's even a transformer in there. Most of the heavy lifting is done by the switching transistor, which consequently means most of the current loss is in there.
QUOTE(chris888222 @ Apr 30 2011, 07:23 PM) I heard that placing your 3DS on the cradle with the power on 24 hours a day will deduct it's battery life. True or false? I don't want only an hour's worth of gameplay