New iPad Takes Much Longer to Charge Than iPad 2

new iPad

Couple of days back, we reported that the new iPad continues to draw power even after the iOS battery indicator reports 100% charge.

DisplayMate now reports that after testing the new iPad for some more time, they’ve observed that it draws power for more than 2 hours after the iOS battery indicator reports 100% charge.

Dr. Raymond Soneira of DisplayMate Technologies told PCMag:

At 2:00 hours after reporting 100% charge, the new iPad hardware started to reduce the charging power. At 2:10 the recharging cycle fully terminated with a sharp decrease in power. The new iPad battery is truly fully recharged 2 hours and 10 minutes after prematurely reporting on screen that it was fully charged,”

However, Soneira points out that the new iPad is not the only tablet to display such a discrepancy. He believes that there is a bug in the way Apple is computing the battery charge:

“Other tablets and smartphones also lie about their charging status. The charge indicator on all mobile devices is based on a mathematical model of the charge rates, discharge rates, and recent discharge history of the battery. It uses this information to estimate how much running time is left. … So there is something wrong with the battery charge mathematical model on the iPad”

Soneira points out that since the new iPad uses the same power adapter and internal charging circuitry of iPad 2, it is taking longer to charge as the new iPad’s Retina Display takes 7 watts of power compared to the iPad 2′s 2.7-2.8 watts. Soneira reports that in their tests he found that the new iPad takes about seven hours to charge compared to iPad 2, which took 4 hours. And if you add the 2 hours where it continues to draw power, the new iPad takes 9 hours to fully charge.

It is not clear whether iPad 2 continues to draw power after reporting 100% charge, if it doesn’t then it means that iPad 3′s battery, which comes with a bigger battery that has 70% more capacity, takes more than twice the time to charge compared to iPad 2. Though we expected the third generation iPad to take longer to charge due to the extra capacity, we didn’t expect it to take so much time.

While it is not such a big deal, it is nice to know how much time it takes to charge the new iPad, so you don’t forget to leave it overnight for charging.

Like this post? Share it!

  • Trapp

    And what did u expect? That twice as big battery would be charged anyway faster than twice as long? They are engineers not wizards.

  • Gilian777

    Supply bigger charger perhaps? Nice ! a sharper screen…but the Ipad is heavier, bigger, hotter and takes more than as long to charge…what’s next?

    • http://www.motorbeam.com/ fas

      Next is what?

  • Ralph Montgomery

    So I am a technologist and would understand 25w=4 hours, 45w=7 hours as the comment above said “they are engineers not wizards!” so I asked my wife what she would expect and now I guess I understand all the hoopla: “It’s just an upgrade, I wouldn’t expect it to take any longer to charge than the older model”. There you have it: The Average Consumer Opinion.

    Fix it Apple!

  • Tony

    What, 7 hours to fully charge, this is laughable at best. Who wants to wait 7 hours to get a full charge. Man, Apple really blew it on this one.

    • marcio

      Well, you´re happy guys. Mine took 12 hours (yes, 12) to get fully charged.
      That´s the post PC era, where MOBILITY is the key word… isn´t it, Apple?
      12 hours plugged on the wall… very mobile. Give me a break.

  • Steve Sosan

    Well mine takes about 5:30 hours to fully charge (reach %100),
    And 2-3 days to reach %10, depending on the use
    But I have not noticed that it is heating up like everyone else, not even very warm!!
    Maybe I am not using it as intensely!
    Could someone give me an example of what app to use and for how long? so I can test it

  • Sedrick

    Issue IS ont Orly wih thé charger but more wih the circuitry of the new iPad to provide more power. Even if you supplied through a 10 amps charger, it’s up to the iPad electronics to make use of it.
    Add to that that the quicker the hotter it gets and the more your loose battery life in the long term.

    With that said I do agree that apple should have take care of both aspects instead of just fixing power consumption and not charging speed.

    • Sedrick

      Sorry, typos from French spell checker …. IOs style LOL

  • Kimk69

    Well why didn’t he check the iPad 2 too.
    I’m sure it does. They all do. iPhone’s trickle
    Charge. You have to expect some of this.
    Who says everything has to be the same as previous. Now the case maker is gonna tell apple how to fix there s**t. Lol. Like the temperature runs 10 degree’s hotter. So what.
    Quad core graphics with a hungry new screen and apps. Compare that to my MacBook pro playing a game or just watching a video. So it says a 100% and counts down normally as you use it. Knowing that if I leave it on there a little longer it will be able to be used for a while with the 100% staying there before it moves. I realize that when apple says the battery lasts 10 hours I’m sure there talking about it being on that fully full charge but so what. Apple is trying to squeak by making it sound a little better then what it is. Again, so what. 8 hours, 10 hours is awesome. The whole pad is practically a battery.

  • Kimk69

    Oh, I thought it was a case maker. Lol. My bad.

    • Danny

      Yeah, your bad. Many people are misunderstanding the issue here. If it is trickle charge, then there is nothing wrong with the software or hardware. The problem is that the new IPad shows 100% charge, yet continues to draw FULL power from the charger.
      It may not matter to the average Joe right now, but there problem is that will this issue cause the battery to lose its ability to retain its charge over time, like 6 months down the road.

  • Thesunz

    Is it just software error or hardware issue?

  • Luis Morales

    All of these claims are way overblown and exaggerated. I have a 3rd generation iPad and I use it all day. I charge it overnight because I obviously sleep during nights. So no big deal, the iPad does not feel warm at all either. The media outlets need to make material and what better to attack then the biggest tech company in the world.

    • Don

      Totally agree!!!

      • iOS5

        Don’t know about you but mine has been warm since day one, even as I’m typing this right this moment. Unlike you I don’t get 8 hr sleep so getting home tired and leaving early can easily make you miss a charge and that’s an issue. With the op that said they go for 3 days before hitting 10% must really not be owning an iPad. No disrespect but you have no use for it expect for braging rights because you can offered it. My job takes me from site to site running different accounts throughout the day, sending and checking emails, running programs and using pandaro since I commute through the dc metro system. I will always take a rapid charge that will last me 5hrs than 10hr charge to last me for 10hrs.

        My 2 cents

    • Steve Sousan

      Yes mine doesn’t get warm at all, even after playing Mass Effect infiltrator, or watching live tv on Directv app.

    • Alisha

      I really think u r the one who exaggerates because u believe it is normal to charge the battery in 8 hours . They should have then targeted customers who o ly sleep at 9 pm and get up at 7 that’s really creepy.

  • Don

    Just charge it overnight!

    • http://Iphonehacks.com Jacqui Howard

      I agree.

  • Dr.kino

    Iphonehacks why decide for everyone that its not such a big deal?!make us people decide please for me it is a big deal! Eventhough it ha bigger battery not suppose to take THIS much longer to charge laptops have huge batteries too do they take this long to charge?!i don’t think so!

  • Hays

    I really feel bad with this New Ipad when I charge and at the same time doing with my application. Instead of charging, it keep decreasing the power instead of increasing. Furthermore it take ages to charge it back. when I call the customer service, they asked me not to use my ipad while charging. So wht is the point having it charged. I dont have problem with iphone and ipad2. Apple must immediate find a solution for all that. It just like iphone 4 when it was first launched. Having battery problem.

  • http://Iphonehacks.com Jacqui Howard

    I bought an iPad 2 back in March. I won a iPad 3 May 25th. I noticed that my iPad 2, charges faster than the iPad 3. I also notice day one, that the iPad 3 does get warm. I never had that happen with my iPad 2. I really understand that with Retina screen is the big deal for iPad 3, and with more resolution, comes more power being used. No big deal. It just has to charge longer. Just enjoy using your iPad, charge over night, and everything will be fine. I have a Samsung galaxy precedent that gets warm, so some devices are like that. Apple will work out the kinks. It is trial and error. Do we want these things to happen? No! When you have a case on there, it is not too bad. We just have to be creative. . It will work, if you find ways to work it. Apple is still #1 over any android device tablet. Just enjoy it.

  • engineer

    1) The iPad 3 has a larger battery and therefore needs a larger power adapter. Use the Apple 10W adapter. The iPhone 5W adapter will take forever.
    2) IOS devices (and, other cell phones & computers) have internal circuitry that cycles charging power on and off as the battery reaches 100%. This prevents over heating due to an excessive charge and electronic failure. The charging rate is throttled back by the circuitry as you pass 90% charge. This is why it takes longer to get that last few percent of battery charge. Aren’t you glad engineers know what they are doing. There is no bug.

  • The The

    Use the correct charger. I used for mistake the iPhone charger, it’s A1205 model (5W). The correct for my iPad3 is A1357 (10W)

  • http://www.vincepicariello.tumblr.com/ Vince

    The iPhone charger draws 5 watts — the iPad charger draws 10 watts. If you use an iPhone charger, you get half the charge for your time. Gotta use the one that came with the iPad!