Will the 12 W power adapter work with the iphone 3GS?

[uzapuca]

Hi guys,
Will the 12 W power adapter work with the iphone 3GS? i read in some forums that is very fast and that also limits battery life very much. Other people said that is a "smart charger" so speeds has nothing to do with battery life.

What do you think?

Besides, i read in Apple Store that is hasn't come with a Power Cord? i guess you connected to the usb and very short cable...that is a bit wrong.

Thanks for any help!

Cheers,

[DeltaMac]

That 12W adapter only comes with an AC power connector that plugs directly into the wall outlet. If you need more length, then you would get to purchase the AC extension cord that replaces the built-in plug, at most any shop that sells Apple products.
Do you need the European connector?
http://www.amazon.com/Apple-extensio.../dp/B004JSGNQO

[acme.mail.order]

Phones will charge from any USB power supply. (Pads need more current). The wattage rating simply states the maximum current the device can deliver before melting.

[uzapuca]

Quote: Originally Posted by DeltaMac That 12W adapter only comes with an AC power connector that plugs directly into the wall outlet.

But the back of the adpter has an USB which i can connect to a 30 pins cable to have an extra 50 centimeters long of cable, right? Thanks for the tip on the longer cable! I am just laughing because Apple does tend to charge a bit much for everything, even for a simple cable. Do you know if that cable is always compatible with the New 12 W Power Adaptor? the connections seems a bit different indeed.

http://www.pixentral.com/show.php?pi...t4fsUQHyrnomG0

(still i don't know how to embedd images in the post)


Have you watched The Simpsons' last episode? Steve Jobs is in heaven talking to God. He tells God that he has a new MyPad and God says but i bought the last one just three months ago...Well that is what i do, says Steve. Very funny, indeed and true.

Cheers,

[uzapuca]

Quote: Originally Posted by acme.mail.order he wattage rating simply states the maximum current the device can deliver before melting.

I didn't get that. It supossed the charger will work fine on the iPhone too regarding Apple website. The debate is that some people state the faster you charge a battery the faster it will de-charge and it will die sooner. Another people says that this idea is nonsense since the last "smart chargers". I don't know what to believe. Do you know on that?

Cheers,

[acme.mail.order]

Electricity 101:

Any USB port will provide 5 volts, at a minimum of 0.5 amps. Multiply and we get 2.5 watts.

Attach a 5 watt load to a standard port and it will shut itself down. (The alternative is overheat and catch on fire)

Larger chargers can provide 5 watts, 10 watts etc. If you have the right components you could build a USB charger that will provide much more, until the metal in the plug overheats and melts. The rating is the maximum power it can provide safely - a 50 watt charger cannot force more power into a 0.5 watt load, it can just supply UP TO 50 watts.

Chargers identify themselves by a resistance across the data pins - the resistance says how much power it can supply and the load can adjust itself accordingly. This is how iPads know not to fast-charge when attached to a standard USB port.

Unless you are connecting the charger directly to the battery's terminals then my advice is not to worry about it. The thinking has been done already by people with post-graduate degrees in electrical and chemical engineering, and make an obscene amount of money designing these systems.

just stay away from the no-name discount chargers. Everything's made in China, but some parts factories are more equal than others.

[anthlover]

I have to disagree here, not with the general electronics education but the end result with an Iphone in this example. Iphones will draw more current from a 10 or 12 watt adapter then a 5 and they will charge much faster. I do it all the time. I Have not tested 10 vs. 12.

I believe I have charged up an Iphone from dead/lighting bolt symbol in to 45-50 percent range in around 40 to 45 minutes. Whether they draw 6,8, 10 or 12, I can not say.

[acme.mail.order]

You bet it will charge faster on a higher-capacity charger. The original question was about an urban legend that the charge will be "too fast" and damage the battery. Clearly false, as a higher-capacity charger cannot force it's higher capacity on the load.

[uzapuca]

Thanks for the unsolving the mystery. Now i can be sure to charge either the iPhone or the iPad with the same 12 W charger without worry that the battery life will end up sooner than expected.

By the way, seems you know much about electricity. Do you know if the regular

Apple 5W USB Power Adapter
http://store.apple.com/us/product/MD...-power-adapter

will work for 220 W as well as 110 W? i read that most Apple chargers are international it means you can either connected them to the Power Outlet in Spain or USA without worrying to explode. I would just need and inexpensive adapter to match each country power outlet.

Cheers,

[DeltaMac]

Why not just buy a USB power adapter locally?
Your local Appinformatica should have something if you just ask for it, and you don't need to purchase an Apple brand adapter.
http://www.appinformatica.com/
They might have at least 6 different choices - just look in the phone section.
this one looks very nice - http://www.appinformatica.com/cables...pod-iphone.php

[uzapuca]

Hi DeltaMac,
thanks for the good tip! and the searching of a local store. Indeed, the best way is to go locally it just happen either my iPhone and iPad 3 were brought from Canada and the US. They cost the same value in the sale number but euros and dollars are almost 25% less, so many people in Europe do ask for friends who travel to bring some Mac products.

Now i will be getting this new 12 W charger and both the 5 W but with the US power outlet version. I just wanted to be sure that since the US use 110 V and most Europe 220 V the charger will work here.

Cheers.

[uzapuca]

No a problem...i was able to find the reply to my question
https://discussions.apple.com/thread...art=0&tstart=0

cheers,

[uzapuca]

Well, well, well...i just borrow an Apple 10W USB Power Adapter for iPad from a friend to charge my iPhone 3GS and it is burning hot! Now i am charging it through my iMac it takes longer didn't like the excesive battery temperature either. It is a mystery if that heat can really affect the phone or not.

Cheers,

[DeltaMac]

"Burning hot" is fairly subjective, I think.
You don't typically use your iPhone while it is plugged in and charging, do you?
Any charging (especially if the battery is nearly exhausted) will heat up the battery, at least to some point. That's quite normal.
If your battery is original, it is about 3 years old. Perhaps it is just letting you know that replacement time is near

[uzapuca]

Quote: Originally Posted by DeltaMac "Burning hot" is fairly subjective, I think.

hahaha, you are right, temperature is always subjective. I was just concern since i always charged my iPhone through my iMac and there was almost no heat at all while charging.

Quote: Originally Posted by DeltaMac If your battery is original, it is about 3 years old. Perhaps it is just letting you know that replacement time is near

I have the battery replacement kit from iFixit.com...i should be brave enough and proceed.