New iPad power indicator reportedly two hours too fast

Screenshot of an iPad charging

According to some recent reports, the new iPad battery level indicator seems to shows a full tank two hours and ten minutes before it's actually charged to full capacity. This news means, contrary to appearances, it really takes about 9 hours to get a full charge from scratch. The tests were run by DisplayMate, the fine folks that analyzed the display on the new iPad.

If accurate, this would be the second time an iOS indicator was found to be misreporting state. During the antennagate controversy, Apple admitted that the cellular signal indicator on the iPhone 4 was showing an erroneously high cell signals, and issued an update to fix it.

However, it seems that misreporting battery state is something that a lot of tablets actually suffer from, since the power status is figured out through an algorithm which can have flaws in it.

Despite having a higher-capacity battery, the new iPad's power adapter is the same as the iPad 2, so it's natural to expect charging to take longer; odds are most of us were going to be charging new iPads overnight anyway, when an extra two hours isn't going to make a huge difference.  

How much power does your iPad have before you plug it in at night? Will an extra two hours charging time throw off your routine with the new iPad?

Source: PCMag

Simon Sage

Editor-at-very-large at Mobile Nations, gamer, giant.

More Posts

 

-
loading...
-
loading...
-
loading...
-
loading...

← Previously

Only 6% of iPad sessions on cell networks, even LTE iPads spend most time on Wi-Fi

Next up →

How websites are adapting for the new iPad Retina display and other HiDPI screens

There are 40 comments. Add yours.

dloveprod says:

I'm usually around 30% but I only sleep 6-7 hours so if I'm ever on empty i won't have a full charge in the morning.

mark says:

If it takes nine hours to charge, then that could be a problem for an overnight charge, as the average adult doesn't even get the 8 hours of sleep recommended.

Abrante says:

So you're saying that there is a correlation between the "typical sleep time " and the 2-3 discrepancy on the new iPad? Do you seriously believe that the average person will use their iPad right until they fall asleep and start using it immediately upon getting up? You kidding, right?

langley182 says:

I do not think that is the issue. A lot of people do not charge their iPad until they get in bed, and then they are off to work or school when they wake up. The heavy use throughout the day might kill the battery, yet they do not have 9 hours to charge it.

dshanah says:

That's often how I use my current iPad. Heck I sleep with mine next to me on the bed most nights and use it first thing when I wake up to check email, read the news and so forth.
I rarely charge mine overnight, I usually plug it in to charge while I'm in the shower and having breakfast, etc. (it usually doesn't require a full charge). Will be interesting to see if the new one (which just departed HK enroute to me early next week, yippee!) creates a problem with overly long recharge requirements.

Radu Tanasescu says:

Yes, some people, many people actually, will use their iPads untill they fall asleep and right away as they wake up?
Want a scenario? Reading eBooks. You read a book until you fall asleep and you're going to continue to read it in the morning... on the... throne... so to speak.
Plus people love their iPads, they will use them as much as they can, at least in the beginning.

David says:

Actually....I do. I read a book on my iPad until I fall asleep, and usually check news, email, weather soon after waking.

DJ Hellfire says:

Yeah, but you have to keep in mind that a 0% charge isn't going to be in sync with your bed time. It's not like if you go to bed at 9pm, that's the exact time the iPad will reach 0%. It's more likely that it will die during the even in which you would put it on charge well before bed time. So it should fully charge overnight unless you are too obsessed to put the thing down to charge when it dies and let it rest a bit.

musicfor18 says:

The iPhone 4S does this, as well, although it only takes another 20 minutes or so to reach full carte after 100% is displayed. I don't think this is a mistake. The iPad is designed to do a trickle charge after it reaches 100%

benjimen says:

OMG... the scandal of it all! ;-)

ZeroLeonheart says:

I charge mine at night, also turning it off. Sleep at 12:30-1:00am to 7am, 100% in the morning. Turning it off seems to do the trick.

Luis says:

Even if your at 50% battery which is about 5 hours last, you would not want to not charge your device over sleep time, because if anything I learned, is that chargning it is a nightmare, I confused the iPhone cable with the iPad, and while using it, it doesn't charge, so i was stuck 3 hours at 19%.
It takes the whole night to charge up, so even when its > 30% you want your device fully charged at day. After all it's battery is supposed to not have memory charge, right?

macharborguy says:

this is why I bought a couple of the IPad 10W chargers, and use them with both my iPad and iPhone 4. Been doing that for the past 2 years and have had no battery issues yet with my iPhone

Stefon says:

My 4S is doing that as well. When it's plugged in it shows as fully charged @ 100%, but when I unplug it, it drops to 96%. Could there be a bug in iOS 5.1?

musicfor18 says:

The dropping immediately to 96% isn't normal, but it's not a bug. Do a full discharge/recharge and then see if it still happens. If so, do a restore. If it still happens call Apple.

Nyan Cat says:

If its jailbroken then it's just a fault in the jailbreak itself. I noticed that on my iPod running 5.1, however I would never jailbreak my 4S.

Mainak says:

I have a Jailbroken 4S. It always charged to 100% and didn't drop to 96% as the OP said. But now I am on iOS 5.1 and it definitely drops to 96% immediately after unplugging my phone. It's got nothing to do with a jailbreak.

sphinx23 says:

9 hours to charge the Ipad is crazy, and here I was testing the charging times to see how long it takes to charge.I was getting about 6 hours before it showed an full charge, maybe the next update will correct the battery meter.

Glenn#IM says:

I really wanted to see with medium use, no game playing, how long would the iPad last. I searched the web, downloaded more purchased apps, and read news articles. I took breaks, but kept the screen on. The brightness was a little less than 50%. I got a good 10 hours out of it, and had 14% left. Plugged it up to charge in sleep mode. Left the house WiFi on. And the iPad did a backup via iCloud. After 8.5 hours it was fully charged. Now if I was a heavy gamer, I am sure battery life would be less, I believe this will be the norm. Reference the battery indicator, my iPhone does the same. I agree with others, this may be a 5.1 issue.

musicfor18 says:

My 4S battery did this prior to 5.1 also

Richard says:

This is the start of the end of the world

Stevejobs96 says:

I get 8 hours of sleep and when I wake up my iPad isn't fully charged... The charging really sucks

Abrante says:

Apple's suggestion is "change your sleeping pattern" 10 hours of sleep is much better because your new iPad will be fully charged :)

CycloneFW says:

My old iPhone 4 (GSM), iPhone 4S, and original iPad all would get to 100% but still have the lighting icon for about 5-10 minutes. Then it would turn the the the plug icon. I haven't seen a "new iPad" in person yet, but I wonder if this "2 hours" is the time from 100% with lightening icon till the plug icon? And I wonder if that's two hours with the screen on?

sangs says:

This might be the most absurd discussion I've seen around here - and that's saying something.

west3man says:

Then your bar is too low. How a product operates or fails to is a fine topic of conversation on a website created for such things.

appliancemedic says:

This is a good reason just to keep your iPad2. You will not have to adjust your sleep time .

Hans says:

I have a question.
The iPhone charger is 5W charger and the iPad charger is 10W charger. Is it okay to charge my iPhone from my iPad charger or vise versa?

crateish says:

Haven't noticed how long the charge takes, but here's how you know it's completely charged:
The charger's brick is cool to the touch. Until it's done, the 10W brick is pretty warm.

RemE says:

The point of this article is that when the iPad3 displays 100%, it may not be fully charged. This would not be unlike Apple to gloss over a sticking point. The only way to verify this is to either put a current meter in the output of the charger or measure the A/C power drawn by the charger (e.g. plug the charger in to a Watt Meter). If they in fact show 100% on the iPad a full 2 hours before the charge rate drops, then that really smells like a shady claim. Lithium batteries are not like other chemistry batteries, they are charged to a very specific voltage (4.2V per cell) and then the charge is completely stopped, they are NEVER trickle charged. Apple did state that they stop charge, let the battery charge dip a little, then top off again, over and over. This is a good practice but does not really address a charge that continues a full two hours after the pad reads 100%
Apple could have made a 20watt charger and done it right. I think portable devices should charge in 1-4 hours max to allow users to keep their things up and running with less time tied up to a power outlet. I'm certainly no fan of a 9 hour full charge.

Coreen Seaburn says:

I have to say that for the past few of hours i have been hooked by the impressive articles on this website. Keep up the great work.

Shonna Camcam says:

Okay i have a newly purchased 16gb second generation ipod touch and i was sad that it didnt have a mic. i want to buy one. i saw the earphones with the mic on them and heard they dont work. do they ones from touchmic.com work??? i have hears some reviews they do and some they dont.

Jani Shippee says:

Thanks, this worked for me too. After the respring, the iBooks icon was still present, but it was deletable. After I deleted it, I reinstalled iBooks, and everything works.

Brendon Quinlisk says:

Worked perfect for my ipad2The only issue I have is that links in email dont work

Estela Mavropoulos says:

You can set icons through HTML as well with "rel=apple-touch-icon" and by pointing the href to the png, do that per page and it should allow you to use different icons per page.

Belle Zamora says:

To be fair, the iPad is not a laptop replacement as it is quite inadequate to do much more than read the paper or play a game or two. Get a MacBook Air if you need to do work, it will blow the Windows 7 laptops out of the water.

sony ipod says:

I am not sure where you are getting your info, but good topic. I needs to spend some time studying much more or figuring out more. Thanks for wonderful information I was looking for this information for my mission.

Stuart Parayno says:

I have to say that for the last few of hours i have been hooked by the impressive articles on this blog. Keep up the wonderful work.