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Battery takes forever to charge
- Thread starter MultiMediaWill
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Hmm quite a lot thread complains that iPad 3 takes much longer to charge. Apple missed this I think, I assume they use the same charger as previous iPad for the sake of uniformity while new iPad uses bigger batter (longer to discharge and unfortunately, charged)
Apple should increase electric current in the new iPad wall charger, should've used one with 15 or 20 watt instead of the old 10watt to compensate bigger battery. Previous iPad going to charge faster and new iPad wouldn't charge longer. Unless I miss something?
Apple should increase electric current in the new iPad wall charger, should've used one with 15 or 20 watt instead of the old 10watt to compensate bigger battery. Previous iPad going to charge faster and new iPad wouldn't charge longer. Unless I miss something?
The only thing I dislike about the iPad 2 is that it takes a really long time to charge. Now you're telling me that the new one takes even longer, like 10-12 hours or something? This is truly rediculous 
Theoretically it should take 4 hours and 15 minutes to charge a new iPad from 0% with a 10 watt charger. (42.5WHr/10W = 4.25 Hr) If you charge it from a USB port on a Mac made after 2007 it'll take almost twice as long. (Max power provided by USB: 5.5W. 42.5WHr/5.5W = 7.73 Hr) Note that this process will take much longer if the iPad is on, whether you're charging from the wall or a USB port. (Given that the iPad is rated to run for 10 hours on its 42.5WHr battery it consumes 4.25 W of energy each hour!)
So what's probably going on is that the batteries that the new iPad comes with haven't been calibrated and are going on the fritz since the battery charging controller doesn't think the batteries have been charged when they have, in fact, been charged.
Apple doesn't provide any instruction on how to calibrate an iPad battery, but they do state here that it's a good idea to charge the battery to 100% and then completely drain it once a month. I would charge it until the charge percentage doesn't seem to be changing anymore, then I would drain the battery completely, then see if the iPad recharges to 100%.
So what's probably going on is that the batteries that the new iPad comes with haven't been calibrated and are going on the fritz since the battery charging controller doesn't think the batteries have been charged when they have, in fact, been charged.
Apple doesn't provide any instruction on how to calibrate an iPad battery, but they do state here that it's a good idea to charge the battery to 100% and then completely drain it once a month. I would charge it until the charge percentage doesn't seem to be changing anymore, then I would drain the battery completely, then see if the iPad recharges to 100%.
Nope. Try again the chargers are different.
But the battery does go quicker than expected.
I will never understand why people can't just charge their devices overnight, every night. You'll be asleep. It's not that hard.
Perhaps what you can't understand is that some apps and games use the battery exceptionally fast and therefor some people can't get through a full day of use. So there you are, 5pm and the battery dies.
I'm charging mine for the first time (from 0) and yes, it's taking forever. I don't have any real data, but it seems to be much slower than the iPad2. I understand why, but it sucks nonetheless.
What originally came with the iPads may be slightly different, but they're all 10 watts and Apple only sells one model for all three iPad generations. See:
http://store.apple.com/us/product/MC359LL/A?fnode=MTc0MjU4NjA
How fast the battery charges is controlled by circuitry inside the iPad and how much current the charger is capable of providing. All iPad wall chargers are the same in this respect.
Not really--even in theory. The iPad will not charge to 100% at full amperage. No device with a lithium battery can do that.
It will charge to 70-90% then lower the amperage till it achieves a full charge. That last 10-30% can take as long as the initial 0-70%. It might not even be wise to charge too much faster than its designed discharge rate.
Beyond that we know charging isn't 100% efficient. So there is no chance every WATT of power the charger delivers actually makes it into battery storage. A lot of it is lost as heat.
So I don't see what the issue is. Of course a 70% higher capacity is going to take a heck of a lot longer to charge.
Michael
Mine is also very slow, but I'll plug it in and go to bed so no issue for me.
What my issue is, is that the wall charger gets really hot. I don't know if this is normal. On my MBP the charger square-thingy (my apologies, I'm a bit tired) does get really warm but I would say the iPad charger is hotter.
What my issue is, is that the wall charger gets really hot. I don't know if this is normal. On my MBP the charger square-thingy (my apologies, I'm a bit tired) does get really warm but I would say the iPad charger is hotter.
I went sleep at 1pm, left my iPad charged to the wall with 25% battery, when I woke up at 9, it was charged to 88%. it's totally ****ed up!
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I just woke up and stupidly I had forgotten to insert the 30pin connector properly. My battery did not charge
I'm heading to the gym in a moment and will switch the device off while charging. Hopefully I can get 30% charge in the two hours I will be away.
I'm heading to the gym in a moment and will switch the device off while charging. Hopefully I can get 30% charge in the two hours I will be away.
HOOOORAY! Someone else finally understands this! Yes, the circuitry controls the charge RATE so even if you used a 10000AMP/HR charger it will make no difference "watt"soever (pun intended). If this were not the case the lithium polymer battery would explode just like this example:
http://www.youtube.com/watch?v=IsgnZCEeqsE
It's a long video but watch the battery slowly SWELL from overcharging then the fiery explosion at the end. Li-Po batteries are inherently VERY dangerous unless properly charged.
anybody else seeing similar charging times?
this would be a huge $uck because weekdays, i usually only get about 6-6.5 hrs of sleep. this would mean that i wouldn't be able to get a full recharge each night on the new ipad.
I'm amazed how long it is taking to charge. I plugged my iPad into a wall socket last night (before I went to bed) and 10 hours later it is showing 97% charged !
If it takes this long with a wall socket - imagine how long it will take with a USB cable attached to the PC or even in the car cigarette lighter...
If it takes this long with a wall socket - imagine how long it will take with a USB cable attached to the PC or even in the car cigarette lighter...
I'm not sure where these people are getting these times. I charged for seven hours overnight from zero and I woke up to 100%.
32gb non 4g
I ran mine down to completely flat from out the box (96%).
It would not turn on when I plugged it into the charger at 00:30 hrs. I got up for the gran prix (05:50) it was 88% full.
@ 07:30 it was 100%.
7hrs to fully charge mine from flat.
Used the charger that came in the box.
Carl.
I ran mine down to completely flat from out the box (96%).
It would not turn on when I plugged it into the charger at 00:30 hrs. I got up for the gran prix (05:50) it was 88% full.
@ 07:30 it was 100%.
7hrs to fully charge mine from flat.
Used the charger that came in the box.
Carl.