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richard371

macrumors 68040
Original poster
Feb 1, 2008
3,607
1,802
Ive had my ipad 2 plugged into my imac 24 for 2 hours now and it has gone from about 60% to about 80% this seems extremely slow.
 

dmb420

macrumors member
Jun 24, 2010
62
0
Ive had my ipad 2 plugged into my imac 24 for 2 hours now and it has gone from about 60% to about 80% this seems extremely slow.

Use the wall charger. Don't charge using a computer. This was a common problem with the 1st gen iPad.
 

richard371

macrumors 68040
Original poster
Feb 1, 2008
3,607
1,802
I tried the charger it came with and it went from 87-89 percent in 10 mins. So it will take 500 mins to charge from 0?
 

Mystikal

macrumors 68020
Oct 4, 2007
2,440
0
Irvine, CA
This is why I dont have the battery % disabled on any product. It makes you way too paranoid and think something is wrong.
 
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eff pc

macrumors regular
Jul 12, 2008
165
0
I tried the charger it came with and it went from 87-89 percent in 10 mins. So it will take 500 mins to charge from 0?

The first 80% charges quick then the last 20% trickle charges so that's what yours took 10 minutes to go 2% because your above 80%
 

claygreenberg

macrumors member
Feb 26, 2009
32
0
Mine is charging really slowly, too. Using the supplied 10W adaptor and cable, plugged directly into the wall. And I'm at 54% right now, so it's not the trickle theory.
 

Next Tuesday

macrumors 6502a
Sep 14, 2006
682
0
Orlando,FL
I drained my battery completely overnight. I plugged it in 3 hours ago and its only at 31%. Thats pretty slow if you ask me. Im using the charger that came with the ipad plugged into the wall. a
 
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iMattcotv

macrumors 6502
Jun 22, 2010
289
0
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

The first time you get an iPad, don't charge it, let it fall below 10% and then charge it.

This guarantees a better battery (and has been proven)

After that, charge via wall for 10 full hours, then use it. It should last like 2 days before you will have to charge it again with heavy use on 50% brightness.

Never let an iPad battery go below 20% before charing it.

Do this with all iDevices to maximize battery life.
 

admanimal

macrumors 68040
Apr 22, 2005
3,531
2
Never let an iPad battery go below 20% before charing it.

Do this with all iDevices to maximize battery life.

What is the point of "maximizing battery life" if you are limiting yourself to only using 80% of its capacity right off the bat?
 

v66jack

macrumors 6502a
May 20, 2009
669
1
London, UK
Ive had my ipad 2 plugged into my imac 24 for 2 hours now and it has gone from about 60% to about 80% this seems extremely slow.

A lot of USB ports are not powerful enough to charge the iPad. Advice is to use the wall charger, or if thats not possible try changing the USB port you are using. One of the ports on my MB charge the iPad and the other doesn't so it's worth moving it around to see if it makes a difference.
 

poloponies

Suspended
May 3, 2010
2,661
1,366
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

The first time you get an iPad, don't charge it, let it fall below 10% and then charge it.

This guarantees a better battery (and has been proven)


Never let an iPad battery go below 20% before charing it.

Do this with all iDevices to maximize battery life.

None of that makes sense:

http://www.apple.com/batteries/ipad.html
 

ToeJamathon

Cancelled
Jun 1, 2010
7
0
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

The first time you get an iPad, don't charge it, let it fall below 10% and then charge it.

This guarantees a better battery (and has been proven)

After that, charge via wall for 10 full hours, then use it. It should last like 2 days before you will have to charge it again with heavy use on 50% brightness.

Never let an iPad battery go below 20% before charing it.

Do this with all iDevices to maximize battery life.

Did you mean below, not above?

If so, are you supposed to charge them before they reach low battery to get the best out of it?
 

53x12

macrumors 68000
Feb 16, 2009
1,544
4
The first time you get an iPad, don't charge it, let it fall below 10% and then charge it.

This guarantees a better battery (and has been proven)

After that, charge via wall for 10 full hours, then use it. It should last like 2 days before you will have to charge it again with heavy use on 50% brightness.

Never let an iPad battery go below 20% before charing it.

Do this with all iDevices to maximize battery life.

Tell me where you heard this and who "proved" it.
 

Julien

macrumors G4
Jun 30, 2007
11,835
5,432
Atlanta
Here is the way to look at it. Charging an iPhone is like fueling up a MINI. Small tank is quick to fill. The iPad has fuel tanks (BIG batteries) like a large truck. Using the same size hose it takes a LOT longer to fill up. The charger that comes with the iPad has a larger "hose" but it still a gigantic tank to fill.
 

slicecom

macrumors 68020
Aug 29, 2003
2,065
98
Toronto, Canada
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

The first time you get an iPad, don't charge it, let it fall below 10% and then charge it.

This guarantees a better battery (and has been proven)

After that, charge via wall for 10 full hours, then use it. It should last like 2 days before you will have to charge it again with heavy use on 50% brightness.

Never let an iPad battery go below 20% before charing it.

Do this with all iDevices to maximize battery life.

This is completely false. Don't make up claims like "its been proven" when it clearly hasn't.

It's true for devices with nickel-based batteries, but none of Apple's iOS devices have ever had a nickel-based battery. With lithium polymer batteries, keeping them charged as much as possible is the best way to maintain battery life. Running them down can cause damage and shorten battery life. See more straight from Apple here: http://www.apple.com/batteries/
 

h00ligan

macrumors 68040
Apr 10, 2003
3,028
136
London
I'm using the wall adaptor and I definitely consider the iPad 2 to charge slower than the first.

Wit...guess I better check it's not plugged into the iPhone charger.,,...it's not.

Very slow charging it seems. Hmm
 

JRoDDz

macrumors 68000
Jul 2, 2009
1,927
183
NYC
Here is the way to look at it. Charging an iPhone is like fueling up a MINI. Small tank is quick to fill. The iPad has fuel tanks (BIG batteries) like a large truck. Using the same size hose it takes a LOT longer to fill up. The charger that comes with the iPad has a larger "hose" but it still a gigantic tank to fill.

Agreed. The iPad has a 25 watt hour battery. It will take a little longer than say an iPhone to charge. always use the 10 watt wall charger to decrease charging times.
 

Dougstrickland

macrumors newbie
Mar 18, 2011
4
0
All about the adapter

I picked up a small USB volt/amp meter on Meritline that goes inline between the power adapter and the iWhatever (or any USB device actually).

I found that on my MBP USB ports charging an iPad 2 I get about 400mA charging at any level of battery. From the supplied adapter it charges at about 900 mA.

The charging still takes awhile, but it is CLEARLY dependent on what you plug it into to charge it.
 
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