How long should the battery last while surfing the web?

I'm curious to know how long the battery on my Macbook should last when just surfing the web and downloading music and videos. I'm getting about 3 hours, I have a feeling it should be a lot longer. I don't have the brightness all the way up and I dim the illuminated keys.

It really depends on your configuration and what you are doing on the web.
If you have minimum RAM, the HDD will be accessed more often, causing heat which causes the fan to come on more often, which uses up power.
While I watch youtube and other forms of streaming video, my fans are usually on, so my battery life is less.
While cruising these boards and such, my battery lasts twice as long as streaming.
3 hrs while downloading music and videos is not a bad figure.
What you might want to do is watch a 2 hour movie and document the amount of time you get from the battery.
Do the same while streaming a movie.
Do some typing and or general surfing sans streaming type stuff.
The above spans a different range of CPU and graphics usage.
Then post back your times here. You will get a better indication of battery condition.
Also, post back with how much RAM you have.
Adam
Message was edited by: Adam White

Similar Messages

How long should my battery last on my ipod classic

how long should my battery last on my ipod classic?

Depends on its age, settings that in use on the device, what it is being used for, and whether or not it is being charged up to 100% each time (usually takes a minimum of about 4 hours or so).
According to Apple tech specs for the current iPod Classic you should be able to get 36 hours of audio playback on a full charge or up to 6 hours of video.
http://www.apple.com/ipodclassic/specs.html
B-rock

How long should a battery last?

I had 100% battery and by lunch I am down to less than 20% is that normal?

Depending on what you are doing, normally no. However, a bad cellular signal will degrade the battery faster, a great deal of web surfing that includes intense graphics, as well as game playing with processor and graphics work will also degrade the battery. However, I would say that you have something stuck processing. I would check to see if you have a mail process or something else that is causing this issue.
I have an iPhone 5S with 2 mail accounts, one being my push Exchange account for work, I do a good deal of texting, occasional surfing of the web and while at work have terrible cell signal, but I've yet to get that low in a day, running from 8:00am until almost 11:00pm. I also have Locations services on, wi-fi is always on, and so is Bluetooth. These are things that many say to turn off to conserve battery life.
Try a reset. Hold the sleep/wake and home buttons together until you see the Apple logo and then release. The phone will reboot. If that doesn't help, you can try a restore from a backup. Make a current backup of the phone and then restore, either through iTunes or iCloud, depending on where you made the backup.

How long should a battery last on a macbook air and why is my trackpad behaving strangely?

My macbook air is only 6 months old, but I have noticed the trackpad reacting strangely. Sometimes when I click once it clicks twice for me, and sometimes I only have to hover my fingers over the trackpad and it clicks for me. Is this the signal of the battery needing replacement already or something else? My nearest Apple store is 2 hours drive away so I don't want to go there if I don't have to, so advice would be gratefully received

Lindymac
I have been told that I should 1. drain it low at least once a month, and if it is 2. kept plugged in it will have a shorter life,
Yeah, whoever told you that told you the wrong thing.
You NEVER want to do a full discharge
Keep it plugged in when near a socket so you keep the charging cycles DOWN on your LiPo (lithium polymer) cells / battery.
*Contrary to some myths out there, there is protection circuitry in your macbook and therefore you cannot 'overcharge' it when plugged in and already fully charged
You certainly CAN leave your macbook plugged in all the time, take it off charge and drain the battery down to 15 or 20% every couple of weeks or so.
*However if you dont plan on using it for a few hours, turn it OFF (plugged in or otherwise), ...*you dont want it both always plugged in AND in sleep mode
LiPo (lithium polymer, same as in your macbook) batteries do not need conditioning. However...
LiPo batteries do NOT like to be dropped down to 15% or so often,....key word being "often"
A lot of battery experts call the use of LiPo cells the "80% Rule" ....meaning use 80% of the charge or so,.. then recharge them for longer overall life.
Never let your Macbook die from power, you can corrupt files that way, and the batteries do not like it.
The only quantified abuse seen to LiPo cells is instances when often the cells are repeatedly drained very low.
*Also, if youre going to store your macbook away for a few weeks or more,... make sure it has at least a 50% or so charge.
*Cycle count / use/ lifespan is one thing that cant be countered.
Proper treatment is another thing. Just because LiPo batteries dont need conditioning in general,.. does NOT mean they dont have an ideal use / recharge environment. Anything can be abused even if it doesnt need conditioning.
Just use and enjoy your new macbook,
From Apple on batteries:
http://www.apple.com/batteries/notebooks.html
http://support.apple.com/kb/HT1446
but really all you would keep in mind is --"consider 15-20% is the same as 0% and recharge it"
and best "tip" is if its near a socket, .....plug it in as long as you can (especially at home) since cycle count on the battery are the "miles that wear out the tires (battery)"

HELP-How Long Should a Battery Charge Last?

I just had a brand new battery installed in my 2009 MacBook Pro at the Genius Bar. I'm not sure it's holding a charge as long as it should as a new battery. The OS is Mavericks.
How long should a new battery hold a charge?
Thanks

There is no Set Time any battery will last, Run time of the computer. It is Subjective on what you are doing on the computer minute by minute.
The battery should hold a charge for Months if it isn't used. But I take it that isn't your real question.
All batteries only last so long, whether they are ever used or not and how much or how little they are used. They also have a shelf life. So even though you bought a NEW battery doesn't mean that battery hasn't been sitting on a shelf for the last 4 years and in that time it has used up its Shelf Life.
If Apple replaced it you have a 90 day warranty on it. If you find it doesn't work as it did before take it back in and ask to have it checked.

How long should my ipod last on a full charge

How long should by Apple Ipod last on a full charge. Only using it for music.

It depends on your ipod touch brightness, active apps, ect.
averagly is should go around for about 2and a half hours before it turns red.

How can I watch a movie while surfing the web?

I've been trying to figure out if there is any way to anchor the iTunes player so I can watch a movie while surfing the web. I've had no luck, Please tell me there is a way! =)

There are two ways I do this.
1. I set the playback in preferences to play the video in a seperate wind. Then I size the browser window so I can see both at the same time.
2. My prefered method is to play the movie on my extra monitor I use. That way I can run it full screen while working with a full screen browser.
Mort

Two ipods Down - How long should an ipod last?

I gave my daughter a 20gig ipod about two years ago. It crashed, apparently a hard drive problem. It was no longer under warranty when she told me about it. I think she was embarassed that somehow it was her fault it didn't work anymore so she didn't tell me for a few months.
I got myself a 30gig ipod with color screen in May. Now it has crashed. My screen displays a drawing of an ipod with a sad face on it. I tried the reset (menu/select button routine), I tried using different usb ports, I tried charging it for a while. But its dead.
We replaced our pc about 6 months ago, so I can't blane it on the pc, the old ipod connected to a different pc.
I'm 53 years old and treated the ipod gently. I mostly use it in my car since I have along drive to and from work.
Is it assumed that a new ipod can only physically last a year or less? I spent $800 and nothing to show for it.
Dell XPS400 Windows XP I'm using Windows XP Media Center 2004

Hi,
Firstly, I do not mean that you and your daughter treated your iPods badly. I have bought at least 10 different iPods for my family members or friends, only 1 mini iPod needed to sent it repairing. Few of them have the problems and managed to be solved, see details for the solutions.
iPod's hard drive may get damaged due to heat, humidity or altitude, and most cases caused by corrupted iPod software.
If a sad iPod icon or an exclamation point and folder icon appears on your iPod’s screen, or with sounds of clicking or HD whirring, it is usually the sign of a hard drive problem and you have the power to do something about it now. Your silver bullet of resolving your iPod issue – is to restore your iPod to factory settings.
http://docs.info.apple.com/article.html?artnum=60983
If you're having trouble, try these steps at different levels one at a time until the issue is resolved. These steps will often whip your iPod back into shape.
Make sure you do all the following “TRYs”
A. Try to wait 30 minutes while iPod is charging.
B. Try another FireWire or USB through Dock Connector cable.
C. Try another FireWire or USB port on your computer .
D. Try to disconnect all devices from your computer's FireWire and USB ports.
E. Try to download and install the latest version of iPod software and iTunes
http://www.apple.com/ipod/download/
http://www.apple.com/itunes/download/
For old versions (window only)
http://www.ipodwizard.net/showthread.php?t=7369
F. Try these five steps (known as the five Rs) and it would conquer most iPod issues.
http://www.apple.com/support/ipod/five_rs/
G. Try to put the iPod into Disk Mode if it fails to appear on the desktop
http://docs.info.apple.com/article.html?artnum=93651
If none of these steps address the issue, you may need to go to Intermediate level listed below in logical order. Check from the top of the lists to see if that is what keeping iPod from appearing on your computer in order for doing the Restore.
Intermediate Level
A. Try to connect your iPod with another computer with the iPod updater pre-installed.
B. Still can’t see your iPod, put it in Disk Mode and connect with a computer, instead of doing a Restore on iPod Updater. Go and format the iPod instead.
For Mac computer
1. Open the disk utility, hope your iPod appears there (left hand side), highlight it
2. Go to Tab “Partition”, click either “Delete” or “Partition”, if fails, skip this step and go to 3
3. Go to Tab “Erase” , choose Volume Format as “MAC OS Extended (Journaled), and click Erase, again if fails, skip it and go to 4
4. Same as step 3, but open the “Security Options....” and choose “Zero Out Data” before click Erase. It will take 1 to 2 hours to complete.
5. Eject your iPod and do a Reset
6. Open the iPod Updater and click “Restore”
For Window computer
Go to folder “My Computer”
Hope you can see your iPod there and right click on the iPod
Choose “Format”. Ensure the settings are at “Default” and that “Quick Format” is not checked
Now select “Format”
Eject your iPod and do a Reset
Open the iPod Updater and click “Restore”
In case you do not manage to do a “Format” on a window computer, try to use some 3rd party disk utility software, e.g.“HP USB Disk Storage Format Tool”.
http://discussions.apple.com/thread.jspa?threadID=501330&tstart=0
C. Windows users having trouble with their iPods should locate a Mac user. In many cases when an iPod won't show up on a PC that it will show up on the Mac. Then it can be restored. When the PC user returns to his computer the iPod will be recognized by the PC, reformatted for the PC, and usable again. By the way, it works in reverse too. A Mac user often can get his iPod back by connecting it to a PC and restoring it.
Tips
a. It does not matter whether the format is completed or not, the key is to erase (or partly) the corrupted firmware files on the Hard Drive of the iPod. After that, when the iPod re-connected with a computer, it will be recognized as an fresh external hard drive, it will show up on the iPod updater.
b. It is not a difficult issue for a Mac user to find a window base computer, for a PC user, if they can’t find any Mac user, they can go to a nearest Apple Shop for a favor.
c. You may need to switch around the PC and Mac, try to do several attempts between “Format” and “Restore”
http://discussions.apple.com/thread.jspa?messageID=2364921?
Advance Level
A. Diagnostic mode solution
If you have tried trouble shooting your iPod to no avail after all the steps above, chances are your iPod has a hardware problem. The iPod's built-in Diagnostic Mode is a quick and easy way to determine if you have a "bad" iPod.
You need to restart your iPod before putting it into Diagnostic Mode. Check that your hold switch is off by sliding the switch away from the headphone jack. Toggle it on and off to be safe.
Press and hold the following combination of buttons simultaneously for approximately 10 seconds to reset the iPod.
iPod 1G to 3G: "Menu" and "Play/Pause"
iPod 4G+ (includes Photo, Nano, Video, and Mini): "Menu" and "Select"
The Apple logo will appear and you should feel the hard drive spinning up. Press and hold the following sequence of buttons:
iPod 1G to 3G: "REW", "FFW" and "Select"
iPod 4G+ (includes Photo, Nano, Video, and Mini): "Back" and "Select"
You will hear an audible chirp sound (3G models and higher) and the Apple logo should appear backwards. You are now in Diagnostic Mode. Navigate the list of tests using "REW" and "FFW". The scroll wheel will not function while in diagnostic mode. For further details on Diagnostic mode can be found at http://www.methodshop.com/mp3/ipodsupport/diagnosticmode/
Try to do the 5in1, HDD R/W and HDD scan tests. Some successful cases have been reported after the running the few tests under the Diagnostic mode. In case it does not work in your case, and the scan tests reports show some errors then it proves your iPod has a hardware problem and it needs a repairing service.
B. Format your iPod with a start disk
I have not tried this solution myself, I heard that there were few successful cases that the users managed to get their iPod (you must put your iPod in disk mode before connecting with a computer) mounted by the computer, which was booted by a system startup disk. For Mac, you can use the Disk Utility (on the Tiger OS system disk), for PC user, you can use the window OS system disk. Try to find a way to reformat your iPod, again it does not matter which format (FAT32, NTFS or HFS+) you choose, the key is to erase the corrupted system files on the iPod. Then eject your iPod and do a Reset to switch out from Disk Mode. Reboot your computer at the normal way, connect your iPod back with it, open the iPod updater, and hopefully your iPod will appear there for the Restore.
If none of these steps address the issue, your iPod may need to be repaired.
Consider setting up a mail-in repair for your iPod http://depot.info.apple.com/ipod/
Or visit your local Apple Retail Store http://www.apple.com/retail/
In case your iPod is no longer covered by the warranty and you want to find a second repairing company, you can try iPodResQ at your own risk
http://www.ipodresq.com/index.php
Just in case that you are at the following situation
Your iPod warranty is expired
You don’t want to pay any service charges
You are prepared to buy a new one
You can’t accept the re-sell value of your broken iPod
Rather than leave your iPod as paper-weight or throw it away.
You can try the following, but again, only do it as your last resort and at your own risk.
Warning !!!! – It may or may not manage to solve your problem, and with a risk that you may further damage your iPod, which end up as an expensive paper weight or you need to pay more higher repairing cost. Therefore, please re-consider again whether you want to try the next level
Last Resort Level
1. . Disconnecting the Hard Drive and battery inside the iPod – Warning !! Your iPod warranty will be waived once you open the iPod.
In Hong Kong there are some electronic shops offering an iPod service for Sad iPod, the first thing they do is to open up the iPod’s case and disconnecting the battery and the Hard Drive from the main board of the iPod. Wait for 5-10 minutes and reconnecting them back. The reason behind which I can think of is to do a fully reset of a processor of the iPod. In case you want do it itself and you believe that you are good on fixing the electronics devices and have experience to deal with small bits of electronic parts, then you can read the following of how to open the iPod case for battery and HDD replacement (with Quicktimes)
http://eshop.macsales.com/tech_center/index.cfm?page=Video/directory.html
2.Press the reset button on the Hard Drive inside the iPod – Suggestion from Kill8joy
http://discussions.apple.com/thread.jspa?messageID=2438774#2438774
Have I tried these myself? No, I am afraid to do it myself as I am squeamish about tinkering inside electronic devices, I have few experiences that either I broke the parts (which are normally tiny or fragile) or failed to put the parts back to the main case. Therefore, I agree with suggestion to have it fixed by a Pro.
2. Do a search on Google and some topics on this discussion forum about “Sad iPod”
Exclamation point and folder and nothing else
http://discussions.apple.com/thread.jspa?messageID=2997880
What should I do with my iPod? Send it or keep it?
http://discussions.apple.com/thread.jspa?threadID=469080&tstart=0
Strange error on iPod (probably death)
http://discussions.apple.com/thread.jspa?threadID=435160&start=0&tstart=0
Sad Face on iPod for no apparent reason
http://discussions.apple.com/thread.jspa?threadID=336342&start=0&tstart=0
Meeting the Sad iPod icon
http://askpang.typepad.com/relevanthistory/2004/11/meeting_thesad.html#comment-10519524
Sad faced iPod, but my computer won’t recognize it?
http://discussions.apple.com/thread.jspa?messageID=2236095#2236095
iPod Photo: unhappy icon + warranty question
http://discussions.apple.com/thread.jspa?messageID=2233746#2233746
4th Gen iPod Users - are we all having the same problem?
http://discussions.apple.com/message.jspa?messageID=2235623#2235623
Low Battery, and clicking sounds
http://discussions.apple.com/thread.jspa?messageID=2237714#2237714
Sad faced iPod, but my computer won’t recognize it
http://discussions.apple.com/thread.jspa?messageID=2242018#2242018
Sad iPod solution
http://discussions.apple.com/thread.jspa?threadID=412033&tstart=0
Re: try to restore ipod and it says "can't mount ipod"
http://discussions.apple.com/thread.jspa?threadID=443659&tstart=30
iPod making clicking noise and is frozen
http://discussions.apple.com/thread.jspa?messageID=2420150#2420150
I am not suggesting that you should follow as well, but just read them as your reference. You are the person to make the call.

How long should my Style last on a charge under 'normal' use?

I picked up a Style in January and had it connect via our corporate BES. I get a few dozen emails a day and reply only occassionally via the BB. More often I use my PC during daylight hours. After hours I get a dozen or so emails, a few (3 - 5) facebook updates, a text message now and again (0 - 2) and little else on a daily basis. I take only support calls when I am not near a land line which averages one or two per day. I've turned down the backlight to 50% and keep only the minimum number of messages. I try to reply without earlier messages when I can. I've tailored down my use of the Style to as low as I dare and yet I cannot get more than a few hours of standby time. If I get on a call that last any length of time at all (20 mins or longer) I get nervous that the phone will lose the radio.
I'm using a Style 9760 with 6.0 bundle 2426 with Sprint. I have 224,720,665 Bytes of Free Memory and resetting the battery doesn't affect this. I have the basic apps but also Facebook for BB and Google Maps, neither of which are on unless I am using it. I typically only have the basic 5 apps that come with the BB running.
This doesn't seem to get any better the longer I have the phone. I've tried some suggestions from the local Sprint store but they don't seem to affect it to any significant degree.
I'm just concerned that the style was designed to be charged a few times each day. Can someone give me a clear idea how long this should last on standby and when I am using it either as a phone or a text device?
- bdm

Hey bmcnamara,
Welcome to the forums.
From your post it sounds like you are doing most things right to save on battery power. One additional thing you can try is turning off locations services. If you use Maps or Facebook Places or any other application that use GPS then will not want to turn this off.
Here is how to turn of location services on your BlackBerry smartphone. Options - Device - Location Settings.
Let us know how you make out.
-SR
Come follow your BlackBerry Technical Team on twitter! @BlackBerryHelp
Be sure to click Kudos! for those who have helped you.Click Solution? for posts that have solved your issue(s)!

How long should I charge my ipad for the first time?

I have bought an Ipad2 and I was wondering if the first time charge will be "different". thanks

You don't need to charge an iPad when you first get it. You can charge at any time.
FYI
The quickest way (and really the only way) to charge your iPad is with the included 10W or 12W (5W on Mini) USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port (many recent Mac computers) or with an iPhone Power Adapter (5W). When attached to a computer via a standard USB port (2.5W, most PCs or older Mac computers) iPad will charge very slowly (but iPad indicates not charging). Make sure your computer is on while charging iPad via USB. If iPad is connected to a computer that’s turned off or is in sleep or standby mode, the iPad battery will continue to drain.
Apple recommends that once a month you let the iPad fully discharge & then recharge to 100%.
How to Calibrate Your Mac, iPhone, or iPad Battery
http://www.macblend.com/how-to-calibrate-your-mac-iphone-or-ipad-battery/
At this link http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html , tests show that the iPad 2 battery (25 watt-hours) will charge to 90% in 3 hours 1 minute. It will charge to 100% in 4 hours 2 minutes. The new iPad has a larger capacity battery (42 watt-hours), so using the 10W charger will obviously take longer. If you are using your iPad while charging, it will take even longer. It's best to turn your new iPad OFF and charge over night. Also look at The iPad's charging challenge explained http://www.macworld.com/article/1150356/ipadcharging.html
Also, if you have a 3rd generation iPad, look at
Apple: iPad Battery Nothing to Get Charged Up About
http://allthingsd.com/20120327/apple-ipad-battery-nothing-to-get-charged-up-abou t/
Apple Explains New iPad's Continued Charging Beyond 100% Battery Level
http://www.macrumors.com/2012/03/27/apple-explains-new-ipads-continued-charging- beyond-100-battery-level/
New iPad Takes Much Longer to Charge Than iPad 2
http://www.iphonehacks.com/2012/03/new-ipad-takes-much-longer-to-charge-than-ipa d-2.html
Apple Batteries - iPad http://www.apple.com/batteries/ipad.html
Extend iPad Battery Life (Look at pjl123 comment)
https://discussions.apple.com/thread/3921324?tstart=30
New iPad Slow to Recharge, Barely Charges During Use
http://www.pcworld.com/article/252326/new_ipad_slow_to_recharge_barely_charges_d uring_use.html
Best Practices for iPad Battery Charging
http://www.ilounge.com/index.php/articles/comments/best-practices-for-ipad-batte ry-charging/
Tips About Charging for New iPad 3
http://goodscool-electronics.blogspot.com/2012/04/tips-about-charging-for-new-ip ad-3.html
How to Save and Prolong the battery life of your new ipad
https://discussions.apple.com/thread/4480944?tstart=0
Prolong battery lifespan for iPad / iPad 2 / iPad 3: charging tips
http://thehowto.wikidot.com/prolong-battery-lifespan-for-ipad
iPhone, iPod, Using the iPad Charger
http://support.apple.com/kb/HT4327
Install and use Battery Doctor HD
http://itunes.apple.com/tw/app/battery-doctor-hd/id459702901?mt=8
To Extend a Device’s Battery Life, Get to Know It Better
http://tinyurl.com/b67c7xz
iPad Battery Replacement
http://www.apple.com/batteries/replacements.html
In rare instances when using the Camera Connection Kit, you may notice that iPad does not charge after using the Camera Connection Kit. Disconnecting and reconnecting the iPad from the charger will resolve this issue.
 Cheers, Tom

How long should a Mac last?

I bought a Macbook Pro in April 2010 and just found out that I need to have the logic board replaced. This computer cost me almost $3000 when I bought it and is now going to cost me another $700 to fix.
I am not happy about this. When you buy a $3000 piece of computer equipment, you expect it to last, at the very least, until it's obsolete. My wife has a 3 yr old DELL laptop that is still functioning perfectly well. My 6yr PC is still going as well as when I bought it, and it is powered on 24/7.
I guess what bothers me the most about this is that this is my first apple mac and I expected it to be of superior quality to its competitors. And for apple to be a superior company in terms of customer support. I was clearly wrong.
How long do you expect your mac to last?

I know I said I would sign off on the topic, but people keep fuelling it.
It would be nice if Apple gave a longer warranty, but discussing Apple policy is not what these forums are for, and in fact is specifically forbidden by the Apple Support Communities Terms of Use.
Are you serious? We aren't allowed to discuss Apple policy on their forum? That seems a little censored. What are they scared of? Maybe they might learn something.
But I get the idea that you are more interested in complaining than in getting actual feedback, since you seem uninterested in hearing that Macs are actually quite reliable. If all you want to do is complain about Apple, you'll find this is not a place where you will find much sympathy.
I am genuinely interested in how long people believe their mac should last. If everyone says that I shouldn't expect my laptop - built by Apple, a $400b company - to last 2yrs, then I will happily give them my money. I'll feel stupid for doing it since I expected more, but I'll do it. If on the other hand the majority say they expect their macs to last, say, 5 yrs, then I will go in asking them to repair it at a discount. Having said all that, a little sympathy on the side would also be nice
I am not out to bash Apple. My household has more than enough Apple products to make us look like fanboy house. I just want to know what people expect from such a prestigious brand.

HT4623 how long should a fully charged battery last ?

Hi,how long should my iphone last after I have fully charged it?

Depends on how you use it... 2-3 days for light users, 8-12 hours for heavy users.

If watching iplayer how long should my iphone 4 last

HOw long should Iphone 4 last if watching iplayer ?

Video playback on a brand new iPhone according to Apple is up to 10 hours (audio up to 40 hrs). Depending on how old the iPhone is, how many cycles on the battery, how many deep discharge cycles, the temperatures it has been subjected to (especially any lengthy exremes of heat or cold), how bright the sceen setting is, whether streaming over 3G or wifi - all will decrease that ideal number from a bit to a lot.

How long should I recharge my dead 60GB iPod before use?

My iPod drained its batteries over the weekend. Needed to reset the date and time and everything! How long should I let it charge on the AC adapter before turning it on and using it? (while still charging, of course.)
Thanks!

if you mean how long you should let it charge before starting to listen to music on it while it is still charging then i would recommend that you let it charge until the battery meter is half full. Hope this helps.

How long is the iPad battery last while watching video on YouTube with 3G?

How long is the iPad2 battery last while watching video on YouTube with 3G?

My iPad 2 battery can use only ~7 hours 15mins when surfing the web using cellular data network. Is it normal?
I would say that's normal. Cellular uses more power than wifi. Your screen brightness is also a factor. Lower the screen brightness & battery will last longer.
The quickest way (and really the only way) to charge your iPad is with the included 10W USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port (many recent Mac computers) or with an iPhone Power Adapter (5W). When attached to a computer via a standard USB port (most PCs or older Mac computers) iPad will charge very slowly (but iPad indicates not charging). Make sure your computer is on while charging iPad via USB. If iPad is connected to a computer that’s turned off or is in sleep or standby mode, the iPad battery will continue to drain.
Apple recommends that once a month you let the iPad fully discharge & then recharge to 100%.
At this link http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html , tests show that the iPad 2 battery (25 watt-hours) will charge to 90% in 3 hours 1 minute. It will charge to 100% in 4 hours 2 minutes. The new iPad has a larger capacity battery (42 watt-hours), so using the 10W charger will obviously take longer. If you are using your iPad while charging, it will take even longer. It's best to turn your new iPad OFF and charge over night. Also look at The iPad's charging challenge explained http://www.macworld.com/article/1150356/ipadcharging.html
Also, if you have a 3rd generation iPad, look at Apple: iPad Battery Nothing to Get Charged Up About
http://allthingsd.com/20120327/apple-ipad-battery-nothing-to-get-charged-up-abou t/
Apple Explains New iPad's Continued Charging Beyond 100% Battery Level
http://www.macrumors.com/2012/03/27/apple-explains-new-ipads-continued-charging- beyond-100-battery-level/
 Cheers, Tom

How long should the battery last while surfing the web?

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