New iPad/iPad 3 charging time = 12 hours+

The USB spec, if I recall correctly is 500 milliamps. This is sufficient to power mice, usb sticks, and other low powering usb devices. The small USB wall charger for the original iPhone I believe produces the same output. I did purchase a 1amp USB mini carcharger which does a did a good job at charging my original iPad. I haven't yet taken my new iPad ona road trip, but I would imagine at a minimum it would charge while in use.

Keep in mind, in outdoors, the iPad3 consumes lots of power -- primarily due to the screen automatically getting brighter to compensate for the outside ambiance or sun. This is the primary reason why it additionally gets pretty warm. My battery drains quickly when using it like this and consequently a cigarette lighter car charger in these circumstances may not be able to keep up.

While at home, the brighness of the iPad should be subdued enough where charging progresses while in use. I have two iPads3's in the house and both charge in their approximate 5 hours from their 15% or so. Because of hte charging issues we've had in the past, I've left a dedicated charging station in the kitchen using the original iPAD3 cable (rightfully labled with a tape in case it was accidentally moved) + the original iPad3 charging plug in the kitchen where each family member leaves one of the two iPads to charge -- sometimes even after work where it's ready and full in evening.

my ipad3 takes about 7 hours to charge fully u could possibly have a faulty charger or perhaps u have been given the wrong one if u use a iphone charger it takes alot longer to charge, maybe if u ring the apple support no. they maybe able to help u.

just dont use it while charging. ِMake sure the airplan mode is on, and let him charge.

I have similar problem too. It takes more than 6 hours to reach 100%.

Anyone know what's the problem?

kell0y wrote:

I have similar problem too. It takes more than 6 hours to reach 100%.

Anyone know what's the problem?

Why do you call a charging time of more than 6 hours a problem?

What charging time did you expect?

My expectation is 3-4 hours. I started the chage at 9.30 am of 6% and only until 8.30pm at 100%..

This is unacceptable!! Too long...

kell0y wrote:

My expectation is 3-4 hours. I started the chage at 9.30 am of 6% and only until 8.30pm at 100%..

This is unacceptable!! Too long...

Are you using the new iPad, i.e. the iPad 3?

Using the supplied 10W charger, my iPad 2 with its 25Wh battery takes almost exactly 4 hours to recharge.

The iPad 3 sports a 42.5Wh battery, therefore its charging time must be well over 4 hours. Expect the iPad 3 to recharge in 6 to 7 hours, provided the iPad is off while being recharged.

Okay, thanks! Point taken.

I cut the 5v Vbus on the cable and hook up a multimeter. with a fully drained ipad 3 battery, It read 0.96amp constantly charging. 5v x 0.96ah= 4.8 Wh

iPad 3 rated at 42.5Wh / 4.8 = 8.85h.

with trickle charging, it may take up to 10h to fully charge.

Been charging 4hrs and it's only 31%. I'll update when it'll done.

It took 13.5 hrs to fully charge from dead battery @ 0.96amp.

Today I charge it starting from 32% battery and it draws 1.2a constantly. 25% faster.

Good analysis Forest. I love the iPad 3, but the longer charging and shorter battery have always bothered me. Of course it's all about the added requirements of the retina. If only apple had used igzo instead of as, I think a lot of this would be a non issue.

I just got my new iPad 3 just a week ago and immediately noticed the charge took forever compared to my original iPad. I googled to find out what others are experiencing and found this discussion thread on Apple's website of all places. This thread has been going on for 6 months? Doesn't anyone at Apple monitor it and provide a better solution? The same 10W charger that comes with the 3 gets real hot after a few hours of charging. Has anyone discussed ways to optimize apps to keep battery from draining so fast?

Aha! Just found the charging tips which explain a lot.

My iPad 3 lasts 10 hours, which is several days for me. And it charges in 7-8 hours from 0%. Pretty reasonable!

Of course I am using the charger and cable that came with it, otherwise all bets are off.

I don't think anyone at Apple is listening or cares. My iPad 3 has been on the charger for 12 hours and has gone from 2% to 47% charge. The iPad is 16 months old, so I'm not happy. On top of this, I took the iPad to the Genius Bar and instead of authorizing a $99 battery replacement, they wanted $299 for a refurbished iPad. What is going on with Apple and the poor quality in the iPad 3? There is no way a lithium ion battery should be done in 16 months time, and there's no excuse for trying to screw over a customer by charging the higher price for a refurbished swap.