Heat = wasted power.
Is that strictly true in terms of computer processing power?
Pretty much everything in a computer is eventually turned to heat after it's used, other than a bit emanating out as sound or light waves.
So it's not "wasted" then.
Heat = wasted power.
Is that strictly true in terms of computer processing power?
Pretty much everything in a computer is eventually turned to heat after it's used, other than a bit emanating out as sound or light waves.
...whereas the Macbook Pro, with it's 77 watt-hour battery, and 85 watt power adapter, would charge in less than an hour. While that's not actually the case, as you can't charge a battery that fast, it offers a lot more headroom for running it while charging than the new iPad does.
Just keep in mind the disclosure you agreed to for using Siri(dictation).
Siri will upload your personal information.
Upload, capture, store, profile...
They also like to share your personal information gathered for "product improvements"
It's like Apple enacted the Patriot Act on Siri users.
http://images.apple.com/legal/sla/docs/iphone4s.pdf.
You're thinking of the Samsung Series 7 tablet they dropped Win 8 Dev preview on and handed out to devs.I thought they were only cooler due to the fans that kicked in when things got warm. Oh wait, maybe I am thinking of the prototype Win 8 tablet.![]()
this argument is completely subjective, whilst $200 may not seem like a lot to you, i sure as hell would want anything i spend $200 on to work flawlessly...
there definitely is a worldwide recognition that Apple produce quality products, and people buy it for that reason - my mum being one.
as i said, this is all subjective, i personally would never use an iPad for more than an hour at a time so for me this is a non issue.
I have a mophie external battery that will charge the iPad 3 while I am using it. It is only 2.1 not the 10w of the iPad charger. Used it for about an hour while plugged in to the mophie battery and it gained about 10%. If yours never charges while in normal use, there may be an issue with your unit. Might want to set up an appointment with a genius.
Exactly. These things use a lot of power, and that's just a side effect of that.
I use my MBP 15" (85W Magsafe) on a 65W charger a lot of the time, since that's what I have around from my older Macbook, and it works fine, but one time when I was Skyping and running a bunch of crap spread across two monitors, it drained slowly while plugged in to the 65W. It's no big deal, the activities that drain it do so slowly enough that it doesn't negatively affect the end user.
The bigger issue I see here is how slow that massive battery is going to be to charge way up with that little power going into it. The iPad has a 42.5 watt-hour battery with 10 watts of input, so even at 100% efficiency, that would be over four hours of charging, whereas the Macbook Pro, with it's 77 watt-hour battery, and 85 watt power adapter, would charge in less than an hour. While that's not actually the case, as you can't charge a battery that fast, it offers a lot more headroom for running it while charging than the new iPad does.
Once again the crowd that thinks this way only thinks in the best-case scenario.
How about at a school where these things won't be plugged in? What happens when you use it cordless and drop the charge to say 30%? And then you plug it in and need to keep using it? It keeps draining. So it's not 20 hours as you state - it becomes significantly less.
I see this becoming a huge issue for airlines that want to use it as a flight device. I know how intense those applications can be on power - I'm a private pilot (not an airline pilot) and having the unit be wireless is a huge factor in how it's used. Airlines don't allow power to be used in excess on airplanes to prevent overloads of the electrical system - that's why your airline adapter only prevents discharging.
Start thinking real-world, not best-case. And please, for the love of God, stop saying it's a non-issue. If it was a non-issue, it wouldn't ******** exist in the first place.
They last for 10 hours. Schools aren't even in session for 10 hours, much less do they have scheduling so tight that they would continually use them for that long. And they would charge them overnight.
They charge when they are plugged in an in use, unless you are playing an extreme game, so your other scenarios are not realistic.
20 watts of power in the cockpit on a jet aircraft is not a big deal. Any current limits that were enacted were because of old electrical systems not designed for modern use, I'm sure modern airplanes have plenty of "hotel" power available. Don't the newest ones have 20A plugs wired at each seat?
You can absolutely fully charge a battery in under an hour.
The antenna was a problem. Fine.
How about when Ryan Block at gdgt.com tried to manufacture "Glassgate", saying that a piece of debris or sand "could" get in between the back glass and a slide on case and scratch the glass or even shatter it if the debris is too big. No known occurences of this. Just something that COULD happen.
That's exactly like what this whole heat thing is. Someone says their iPad got warm with use. Now it's been spun so out of proportion that people are saying they could get 3rd degree burns from checking Twitter on their iPads.
It's irresponsible journalism and it's only happening to get clicks. Honestly, Apple should go after sites like that.
I'm sure modern airplanes have plenty of "hotel" power available. Don't the newest ones have 20A plugs wired at each seat?
Pretty much everything in a computer is eventually turned to heat after it's used, other than a bit emanating out as sound or light waves.
Not in an MBP. The controller limits the charge rate.
Start thinking real-world, not best-case. And please, for the love of God, stop saying it's a non-issue. If it was a non-issue, it wouldn't ******** exist in the first place.
No - in fact some of them can't do 1A (at 120v). I was tripping the breaker (fortunately, thermal auto-reset) on a Cathay Pacific B-class seat with my Latitude. I had to disable the second core and put things into "slow" mode until the batteries charged.
The 120v seat outlet couldn't handle both running normally and charging at the same time - but at minimum power mode I was OK. Once both batteries charged I was able to enable the 2nd core. (The batteries charge serially, so removing one battery would not have made a difference.)
This is so far from the truth it defies logic.
Heat is wasted electricity. You cannot use something, then turn it to heat. You are violating conservation of energy.
You either have heat, or you have "something"...
Just food for thought. Apple can do a lot... but they can't defy physics.
Enlighten us...
In the real world, what class is in session for 10 hours?
In the real world, sometimes you can forget to charge your iPad over night. Fair enough, you go to school with 20% power. What will you be doing in class that is so draining your battery actually discharges when plugged in?
Please don't preach "real world" when you're doomsday scenarios won't actually happen in the real world
If there was no such thing as non-issues, the phrase non-issue would not exist, but it does because it's necessary to describe this.
That's one bad electrical system. I'd think the newer ones would have at least 50-100 amps of 120 volt power available... The big issue for aeros is weight, but once you start generating power, the marginal weight for a little more shouldn't be that much.
I said pretty much everything. The small remaining amount is light or sound, which eventually gets turned into heat in the room anyways...
As was mentioned before, they could boost the voltage up.
Electronic circuitry operates best and most reliably at lower temperatures. However, todays more complex and smaller device dimensions along with closer packing result in higher heat density and elevated operating temperatures.
Higher operating temperatures decrease the service life of the device or module. Any temperature sensitive materials used in a module can degrade and wear out more quickly. Other failure mechanisms, such as metal migration, can occur, particularly when both high temperature and humidity conditions are present. Here, metal whiskers or dendrites can grow from the conducting lines. With lines being spaced closer together in todays devices, shorts between lines can occur and cause device failure. Additionally, when temperatures fluctuate, device interconnections and other components can fatigue from expansion and contraction due to thermal stresses and eventually fail.
Higher temperatures also increase the electrical resistance of the conducting lines within a device or module, slowing the signal speed and reducing performance. As devices become more complex, conducting paths become longer and this performance reduction is more significant.
For all of the above reasons, its critical to minimize temperature of the electronics by designing efficient ways of carrying away their generated heat.
First, I never said a class was in session 8 hours. I said that a battery, at medium to full use, would never last 10 hours. So cut it in half - 5 hours. 5 hours a day using interactive books, graphs, apps that really utilize the GPU and the CPU. Say anatomy, physics, math, storybooks. Whatever. Again, your "real world" at 10 hours is fantasy land since 10 hours is the max the battery lasts at light load.:
Originally Posted by AidenShaw
No - in fact some of them can't do 1A (at 120v). I was tripping the breaker (fortunately, thermal auto-reset) on a Cathay Pacific B-class seat with my Latitude. I had to disable the second core and put things into "slow" mode until the batteries charged.
That's one bad electrical system. I'd think the newer ones would have at least 50-100 amps of 120 volt power available... The big issue for aeros is weight, but once you start generating power, the marginal weight for a little more shouldn't be that much.
Powerports
On some aircraft, your seat may be equipped with a DC power outlet, using a "cigarette lighter" style outlet delivering 15 volts of direct current (and up to 75 watts). We do not provide adapters, but they are available for purchase on the Duty Free cart internationally where we offer duty free. On select B737 & B757 aircraft, your seat may be equipped with an AC power outlet, using an outlet similar to a standard U.S. style home outlet. These AC outlets provide 110 volts of power. On most aircraft*, a power outlet is available at each seat in First and Business class, as well as selected rows in the Coach cabin. On select B737 & 757 aircraft, there is an outlet available on each row.
Outlets may be used to operate laptop computers, CD/DVD players, and other devices with a maximum 75-watt capacity. Outlets are located on your seat console, or mounted to the seat frame below your seat cushion. Look for the "lightning bolt" symbol on the overhead bin rows containing powerport-equipped seats. Splitter or Y adaptor cords may not be used. Only one device is allowed per outlet. System power is available when the green light on the outlet is illuminated. For detailed powerport locations by aircraft type, visit the Our Planes section on AA.com.
http://www.aa.com/i18n/travelInform...oardTechnology.jsp?anchorEvent=false&from=Nav
This CR report means zilch. Will not impact iPad sales at all.
"Already skirting the edge of irrelevance, Android tablets are at risk of being completely overwhelmed by Apple’s new iPad."
What Google Must Do to Keep Android Tablets Alive
http://www.wired.com/gadgetlab/?p=94025?utm_source=twitter
I saw another article yesterday that said it heats up to 97 degrees.http://www.appleinsider.com/article...hows_operating_temperature_of_97_degrees.html
But it can impact/increase the exchange/return rate.
Also, one opinion/article doesn't substantiate a fact but a mere speculation.
What I don't understand:
All of the measurements I've seen were done with the iPad radiating in free air, where the heat is greatly lessened.
I would like a magazine to do a test where the iPad is laying against someone's skin, with a thermometer between.
If that trapped area got to around 109F or above, then you would begin to see undesirable effects like the Toasted Skin rashes that doctors report.
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Another downside of extra heat is that it affects total battery lifetime. An extra ten degrees will take weeks or months away from it.