[solofx7]

My iPad has yet to charge over USB.
After it is done syncing, it never charges via USB.
yes, I am syncing with a Mac.

[Andy8]

Does it charge when you plug it into the external USB charger?

[solofx7]

It only charges when i use the USB to wall charger.

[solofx7]

It just says "not charging" when it is plugged into a computer.

[imitchellg5]

Apple iPad Not Charging Via USB For Some Users - Ipad usb charge - Gizmodo

[solofx7]

Thanks for the article.
I remember reading something like this earlier.
I just cut out the USB hub and it charges fine when directly plugged into my iMac.
I know this is a losing battle, but everything else that I have "ipod-iphone" charge fine via the hub.

[imitchellg5]

Yeap, it's because of the higher power requirements from the iPad.

[solofx7]

Originally Posted by imitchellg5 

Yeap, it's because of the higher power requirements from the iPad.

thanks.
it is a powered usb hub, so i thought it would be fine.

[Wiskedjak]

It seems strange to me that Apple would choose to use USB for power delivery when the iPad requires more power than is standard for USB to deliver ...

[solofx7]

Originally Posted by Wiskedjak 

It seems strange to me that Apple would choose to use USB for power delivery when the iPad requires more power than is standard for USB to deliver ...

I think thats odd too, but there is not much I can do about it.

[imitchellg5]

Originally Posted by Wiskedjak 

It seems strange to me that Apple would choose to use USB for power delivery when the iPad requires more power than is standard for USB to deliver ...

What other options do they have though?

[The Godfather]

Originally Posted by imitchellg5 

What other options do they have though?

Firewire and eSATA, of course.

Seriously, though, you can bet Belkin and others have called their engineers to an emergency design meeting about how to be the first to offer a high power USB hub for iPad sync+charge.

[solofx7]

Originally Posted by The Godfather 

Firewire and eSATA, of course.

Seriously, though, you can bet Belkin and others have called their engineers to an emergency design meeting about how to be the first to offer a high power USB hub for iPad sync+charge.

Yeah, another way to get more money from me

[The Godfather]

Originally Posted by solofx7 

Yeah, another way to get more money from me

That will be the easiest $69.99 sale in history. A $3 hub with a bigger power adapter.

Unless Walmart finds a manufacturer for a dual USB-A -> iPod cable. They'd be able to sell it for $30, easily.

[Wiskedjak]

Originally Posted by imitchellg5 

What other options do they have though?

Data through USB or wireless and power through something that can handle it?



All-in-one is nice and elegant until it doesn't work as expected.

[Simon]

Originally Posted by Wiskedjak 

It seems strange to me that Apple would choose to use USB for power delivery when the iPad requires more power than is standard for USB to deliver ...

It's my understanding that it doesn't draw more than standard. As I understand, the issue is rather that many hub and board manufacturers haven't implemented proper high-power specs per the USB standard.

[solofx7]

Originally Posted by The Godfather 

That will be the easiest $69.99 sale in history. A $3 hub with a bigger power adapter.

Unless Walmart finds a manufacturer for a dual USB-A -> iPod cable. They'd be able to sell it for $30, easily.

no, please, not more of my money

[solofx7]

Originally Posted by Simon 

It's my understanding that it doesn't draw more than standard. As I understand, the issue is rather that many hub and board manufacturers haven't implemented proper high-power specs per the USB standard.

That is very interesting.
I really would like to know why it does not work then.
This issue makes for some inventive wiring on my desk

[Wiskedjak]

My iPod Touch won't charge using the USB cable that came with my 4th Gen iPod. It seems to me that Apple mucks around a lot with the USB standard.

[imitchellg5]

Originally Posted by Wiskedjak 

My iPod Touch won't charge using the USB cable that came with my 4th Gen iPod. It seems to me that Apple mucks around a lot with the USB standard.

Mine will...

[mduell]

You probably don't have one of the select few Macs with Apple's proprietary "high-power" USB ports, so it only charges while sleeping.

Originally Posted by Simon 

It's my understanding that it doesn't draw more than standard. As I understand, the issue is rather that many hub and board manufacturers haven't implemented proper high-power specs per the USB standard.

1200mA @ 12V over USB is completely nonstandard. "High-power" in the USB standard world is any device that uses more than 100mA (1 unit).

[solofx7]

I read somewhere that the iPad will nt charge with the power adapter that you can buy with the iPhone.
My iPad did work and charged rather fast with it.

[Simon]

Originally Posted by mduell 

You probably don't have one of the select few Macs with Apple's proprietary "high-power" USB ports

FUD. They're not at all proprietary. See below.

Originally Posted by mduell 

1200mA @ 12V over USB is completely nonstandard.

It's actually 1100mA at 5V. But regardless of that blunder, you're quite mistaken anyway. I know you enjoy coming here and dumping on Apple to stir a fight, but this time you might really want to reconsider. You obviously have no what you're talking ranting about.

The USB Implementers Forum has created something called the Battery Charging Specification.
http://www.usb.org/developers/devcla...arging_1_1.zip

New powering modes are added to the USB specification. A host or hub Charging Downstream Port can supply a maximum of 1.5 A when communicating at low-bandwidth or full-bandwidth, a maximum of 900 mA when communicating at high-bandwidth, and as much current as the connector will safely handle when no communication is taking place; USB 2.0 standard-A connectors are rated at 1500 mA by default. A Dedicated Charging Port can supply a maximum of 1.8 A of current at 5.25 V. A portable device can draw up to 1.8 A from a Dedicated Charging Port. The Dedicated Charging Port shorts the D+ and D- pins with a resistance of at most 200Ω. The short disables data transfer, but allows devices to detect the Dedicated Charging Port and allows very simple, high current chargers to be manufactured. The increased current (faster, 9W charging) will occur once both the host/hub and devices support the new charging specification.

IOW Apple is operating entirely within a well-defined and published standard.

What needs to happen now is that hub manufacturers specify if their devices are compatible with BCS or not. If you get a BCS-compliant hub it won't prevent your Mac from charging an iPad.

[Big Mac]

Great post, Simon.

[Atheist]

Originally Posted by Simon 

IOW Apple is operating entirely within a well-defined and published standard.

Yet Apple has released a product with what will appear to the average user as a design flaw. An inability to charge while in use and plugged into some Macs and virtually all PCs.

Does anyone know if Apple released the specs on the USB power needs back in January? If so I would be less inclined to bitch about it.

[Simon]

Originally Posted by Atheist 

Yet Apple has released a product with what will appear to the average user as a design flaw. An inability to charge while in use and plugged into some Macs and virtually all PCs.

I'm afraid that's correct and many people will indeed see it that way.

Considering the iPad's power draw I'm not certain what else Apple could have done though. Wireless sync would be one option, but even with that enabled you wouldn't entirely avoid the above mentioned confusion.

[amazing]

Wireless sync over 11n would still be slower than over USB, wouldn't it?

Meantime, it'll be interesting to see a database of Mac models that provide the high-power USB port. And yes, many Mac owners will be outraged to find out their relatively-recent Mac won't charge the iPad...

[-Q-]

At the very least, it should have been communicated on a sticker on the power supply or in the insert that came with the iPad. Scanning the online manual, it appears the potential issue with USB charging is alluded to but not specifically defined (for instance, stating that only Macs manufactured after a certain date have the correct BCS-compliant ports).

[Andrew88088]

Ew, I just stumbled into this issue and just now saw this thread. That sucks.

[::maroma::]

FWIW - If your iPad is saying "Not Charging" when you plug it into your Mac, it will charge when the screen goes to sleep. Its just that when its on, it won't charge. I read this somewhere and have tested it on my own iPad/Mac. Not a huge deal to me, but it is indeed confusing and should be fixed (even if its just better feedback to the user on whats going on there).

[ort888]

Will a standard iPhone car charger charge an iPad?

[Andrew88088]

Yeah, I just read about it charging while it's asleep. That works for me... If I need to use it while plugged in I can just plug into the wall.

[solofx7]

Originally Posted by ::maroma:: 

FWIW - If your iPad is saying "Not Charging" when you plug it into your Mac, it will charge when the screen goes to sleep. Its just that when its on, it won't charge. I read this somewhere and have tested it on my own iPad/Mac. Not a huge deal to me, but it is indeed confusing and should be fixed (even if its just better feedback to the user on whats going on there).

Now I am slightly more confused.
What if you are plugged into a powered USB hub and the iPad says not charging?
Will it charge when it sleeps?

[::maroma::]

Good question. I will test that on my own hub tonight and see what happens. Apple should come out with a definitive response to this. Its pretty confusing and getting some not so great press.

As long as I remember to do so, I'll try out the hub thing tonight and report back.

[solofx7]

Originally Posted by ::maroma:: 

Good question. I will test that on my own hub tonight and see what happens. Apple should come out with a definitive response to this. Its pretty confusing and getting some not so great press.

As long as I remember to do so, I'll try out the hub thing tonight and report back.

Thank you, I will try mine also.

[Eriamjh]

It charges while asleep.

This just in, your refrigerator light goes off when you close the door.

[imitchellg5]

Originally Posted by ::maroma:: 

Good question. I will test that on my own hub tonight and see what happens. Apple should come out with a definitive response to this. Its pretty confusing and getting some not so great press.

As long as I remember to do so, I'll try out the hub thing tonight and report back.

Is it a big deal though? Since Apple ships it with a wall socket adaptor, I don't see what the crying is for.

[::maroma::]

Not really a big deal, but I think many will expect it to act like their iPod or iPhone. I admit I wasn't thinking that it would charge when the screen shut off. It said "Not Charging" which I took to mean the USB port wasn't up to par. I'm certainly not shedding any tears over it though.

[solofx7]

Originally Posted by imitchellg5 

Is it a big deal though? Since Apple ships it with a wall socket adaptor, I don't see what the crying is for.

I was not "crying."
I was mostly concerned that it only came with one cable that was plugged into the back of my iMac and the entire time it said "not charging."
I do not think that it is odd to inquire about.
It was plugged in like everything else, but not charging.
I think that's a reasonable question to ask.

[Wiskedjak]

Originally Posted by imitchellg5 

Is it a big deal though? Since Apple ships it with a wall socket adaptor, I don't see what the crying is for.

It is convenient if you don't have to carry the power adapter around with you if you know that you'll be able to plug into a computer at some point.

[Andrew88088]

Well, it seems that mine isn't even charging in standby while connected to my MacBook. It's been plugged in for about an hour, in standby, and I just unplugged it and the charge was still at 47%. Oh well.

[amazing]

The real shame here is that Apple declined to clearly state what the charging requirements were.

Yes, it charges over USB--but only some USB ports supply enough current. Apple didn't exactly state that very clearly up front, did they? They're not exactly hiding the power requirements, but Apple is certainly not providing full disclosure up front.

It does mean they'll sell a lot of power adapters, so you can have one at the office and one at home.

[::maroma::]

Tested my powered USB hub last night and it worked as my internal USB port does. Doesn't charge when screen is on but charges when screen is off. Good news!

Andrew - I assume you've got your Macbook plugged into the wall when you are trying to charge the iPad through it? (just checkin)

[Andrew88088]

Yup, it's plugged in and charged fully. It's a white MB, C2D 2.16.

It's a little disappointing, but not really a HUGE deal. It seems to be charging rather quickly with the wall adapter.

[The Godfather]

Just to be clear. Are you saying that the iPad's screen must be off, or the Mac's screen must be off?

[Andrew88088]

The iPad's

[::maroma::]

Originally Posted by Andrew88088 

Yup, it's plugged in and charged fully. It's a white MB, C2D 2.16.

It's a little disappointing, but not really a HUGE deal. It seems to be charging rather quickly with the wall adapter.

Doh! That stinks. I'm predicting someone will come out with a cable or dock that will charge on low powered USB ports. Seems to be a market for it now.

[amazing]

Finally, some concrete figures to report. iLounge reports the following, and you'll really want to be recharging with the 10W power adapter, because using lower-power USB ports is much, much longer:

Recharging: Approximately 4 hours when used with included 10W USB Power Adapter, approximately 8-9 hours when connected to high-speed (1.2A) USB port, longer when connected to 0.5A USB port, no charging when connected to most past iPod/iPhone speakers and accessories.

iLounge has some interesting info on battery times:

Summary of Battery Performance Findings
Each of these summarized findings is discussed in greater detail in the appropriate hardware or application section above.
Web: 10 hours, 21 minutes on 50% brightness torture test.
Video: 11 hours, 34 minutes on 50% brightness, 50% volume with HD videos and Wi-Fi on; 11 hours, 43 minutes on same settings with SD videos; 13 hours, 22 minutes with SD videos and Wi-Fi off.
Audio: Approx. 6.25 continuous days on 50% volume, screen and equalizer off, through headphones.
Gaming: 8 hours, 33 minutes on 50% brightness, 50% volume with mix of 3-D HD and 2-D SD games.
Full Mixed Use Test: 8 hours, 59 minutes on auto-brightness, using Wi-Fi (802.11n) and all applications, including everything from video to web to games and productivity apps.

[::maroma::]

Holy jebus, those are some crazy battery numbers! That is magical. I hope they put that same sort of battery power (scaled down) to the iPhone line, and even their Macbooks.

[amazing]

I'll be curious to see how these battery times hold up with iPhone 4.0

Edit: Silly me, thinking that the iPad would get v 4.0 right away! Won't happen till the fall. Here's what Steve Jobs said at a Q&A afterwards, and don't you just love the fast comeback at the end?

"Now, iPad users are going to have to wait until fall to get the remaining features. But that gap in release dates suggests that it’s possible that iPad users will get a version of the iPhone OS that’s slightly more advanced that the one iPhone and iPod touch users will get this summer.

"The glimmer of possibilities emerged during the Q&A session Apple staged with journalists right after Thursday’s presentation. Joshua Topolsky of Engadget asked a great question about why Apple hadn’t done more with simple, viewable information, like a weather forecast—items that could be placed on a Lock screen or Home screen without much trouble. Topolsky pointed out that the iPad, with its large screen, could especially benefit from such additions.

“We just shipped it on Saturday,” Apple CEO Steve Jobs countered immediately. “And rested on Sunday.”

http://www.macworld.com/article/1505..._iphonecentral