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Hopefully this will lead to 20W charger replacements from Apple.

And a move to MagSafe on the next iPad.

They couldn't go to 20W using the USB connection. The latest USB charging spec, revised with the intro of USB 3, is 1.5A continuous current, which at 5V equates to 7.5W, which is about right for a 10W switching power supply.

I thought that the 30 pin connector might also limit increasing the supply current, but on examination, the existing connector only has 6 contacts, so there's room for higher current capability for future iPad models. Maybe they'll use a beefed up 30 pin connector with an MBA power brick.
 
pure guess but it's a 42 watt hour battery so if we say the charger is 80% efficient it would take ~52 watts to charge it.

so you would have to charge it 19 time to use 1kW which is about 25p in the UK.

so it would cost 25p for 19 charges, that doesn't sound right so someone else should probably do the calculations.

edit: no it sounds about right, it's a 10W charger and takes about 6-7 hours to charge that's 60-70 watts used so that's at worst 14 charges per kW, so 14 charges for 25p.

Thanks that's helpful. 25 pounds? Thats close to 40 U.S. I think the electrical companies really pumped the prices up lately. I shopped for a different distributer. See if I see any real savings down the road.
 
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Wtf is CR's beef with Apple?

They get headlines and press exposure by finding fault with Apple products. I'm all for calling out problems with Apple products when they are real, but really this is a non-starter.
 
Charger not keeping up with the usage of battery under heavy load is quite different from not charging under heavy load. To see the difference, repeat the test without plugging in the charger.
 
Thanks that's helpful. 25 pounds? Thats close to 40 U.S. I think the electrical companies really pumped the prices up lately. I shopped for a different distributer. See if I see any real savings down the road.

lol 25p is 25 pence, not £25 :p, so charging the ipad four times a week would use about £3.70 a year
 
Yes I posted this days ago in the iPad forum.

It will not charge under a heavy load.

The 10W charger is just not powerful enough. The Air uses a charger that is 4 times larger for a battery of LESSER size.

There, fixed that for you.

I have actually seen my iPad charge go retrograde on the supplied charger when doing a sync and doing other work in the foreground. The iPad didn't get hot though- the charger did.

Anyway, it will be interesting to see if it's an issue in Japan this week, with the lower socket voltage and frequency there.
 
I love Apple but have no issues with Consumer Reports.

They have reviewed the product. They found stuff to like. They found stuff to criticize. That's their job. When you read it, consider to yourself, do you care if after an hour of the most intensive gaming on the iPad it might be a bit over 100˚F? The answer is probably not and so you won't care. But if you do care, then you might appreciate the fact that CR told you so before you went and bought the iPad.
 
wow the ipad gets warmer. I have felt it. Its not really much warmer. In fact, it is literally "slightly warm" whereas the old ipad was "cool". While not optimal, its fine. And the charging is a expected.

If you think a tablet can run a super high res display, 3D graphics on par with consoles, a radio, a quad core and a dual core chip AND still charge through a puny USB port AND not get any warmer while doing so....
 
You don't think so? So they came up with this design the day after he died?

Heh yeah I considered that and while the design was clearly made before his death (just an assumption based on the time it takes to get a product to market). I just couldn't see him holding it and saying "you know what guys, I think people won't care that this feels notably warmer than the last one, even though it's TECHNICALLY not an issue." or "Yeah, I don't think anyone's gonna play infinity blade for over 45 minutes, screw the charger."

Then again, "No one's gonna hold their phone like this for more than a second, let it go." did happen (blown out of proportion or not), so perhaps I am just completely misled.

I could argue with myself on this all day. I think the uselessness of hypotheticals is the lesson here haha.
 
Pretty much a non-issue, I'd say.....

It's worth noting and all ... but realistically, a few things:

1. A typical use-case scenario for an iPad is using the device while it's not physically attached to the charger. You use it, let the battery run down, and then recharge it like you would a cellphone (typically overnight), with it sitting idle.

2. It's really nothing new that putting heavy processor and graphics loads on a computer for extended periods of time generates a lot of heat. Desktop computers have noisy fans running all the time to dissipate this heat. Portables are much more of a problem. Notebooks usually have smaller, quieter fans, which may spin up to higher speeds to try to dissipate as much excess heat as possible -- but components are also often designed to simply slow down when they get too warm. On the iPad, a fan wouldn't be considered acceptable - so you've got some limitations. Infinity Blade is about the most demanding app you could think of for it, so it's not really a very practical example of "normal" behavior for the iPad.

As long as the iPad gives 8+ hours of battery-operated usage in the vast majority of scenarios and can be fully recharged within another 8 hours or so (an overnight charge), it seems like it fulfills its mission.


That's kind of disappointing that it won't charge under a heavy load. Hopefully apple can come up with some way to fix this issue, such as a more robust charger.

At the end of the day, I guess it still isn't too big an issue because of the large battery already in the iPad, and the fact that most of use it untethered and just recharge when not in use.
 
Next thing you'll hear is people complaining it cant hold a toilet paper roll. :rolleyes:

I'm so sick of people complaining about everything they buy from Apple. Geez, go get your money back if you don't like it !!!!!
 
your holding the new ipad wrong

People should just buy a case for it, for those who are bothered by this, I don't understand why people are surprised by this, computers have always operated hott after a while and this is a small computer. By a case, no need to complain.
 
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I haven't even felt my new iPad get remotely warm. I haven't played a graphic intense game yet.
 
my iPhone 4S gets quite warm when playing intensive games like Infinity Blade II and Real Racing 2. so Warm that i get worried that something will get melted inside lol.

Is this something similar to the iPad 3 heat issues? please reply, cause i am planning on getting the iPad 3 this weekend. Thanks :)
 
Not being able to charge is NOT a minor detail.

Indeed. The getting warmer is irrelevant imho, but if the device can't charge under certain conditions, it's a fault. That means that as long as I'm doing that activity, I have a deadline and then the battery will be drained and the device will shut down. Even if in practice, that deadline is impossible to effect us right now, like playing 30 hours of games in one sitting, the not charging part isn't good at all.
 
I guess Consumer Reports won't recommend the new iPad because of this "excessive" heating. :rolleyes:
CR is a joke.

The heating is kind of normal, considering the massive increase in number of pixels.

Not being able to charge is bad. I often forget/procrastinate in charging my phone and end up reading news or playing games while plugged in.

That said, I don't think my case constitues heavy load, though.
 
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