A lot counts on just how deeply the discharge has actually been, and also are you utilizing outlet power or a computer system USB port for power? If it is on the outlet you could attempt charging more typically, and over-night, so you do not discharge as much prior to recharging. Deep discharging is actually not excellent for Lithium-Ion batteries; research studies show a discharge to 50% and then recharge gives 4 to 5 times the cycle life of a battery deeply discharged all the time.
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User profile for user: Diavonex
User profile for user: TruckerPad
For a prediction you should know the power rating of the AC charger and also the capacity of the Ipad battery.
For my Ipad Mini it took 150 minutes from 44% to 100% through a brand also new battery. The charger is rated as 5W DC yet actually takes about 7W with pedal to the steel.
A healthy 16Wh battery through a 5W charger takes approx 260 minutes to charge from 0 - 100% - about 4.5 hours
Here"s a Ipad Mini battery charge test.
User profile for user: Texas Mac Man
From what I"ve watched in thes forums the moment ranged fro around 6-8 hours. If ytou are using it while it charges, it will certainly take longer.
The quickest method (and really the just way) to charge your iPad is through the had 10W or 12W (5W on Mini) USB Power Adapter. iPad will also charge, although more slowly, once attached to a computer with a high-power USB port (many type of current Mac computers) or via an iPhone Power Adapter (5W). When attached to a computer via a conventional USB port (2.5W, the majority of PCs or older Mac computers) iPad will charge very slowly (however iPad indicates not charging). Make sure your computer is on while charging iPad by means of USB. If iPad is associated to a computer system that’s turned off or is in sleep or standby mode, the iPad battery will certainly continue to drain.
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lutz-heilmann.info recommends that when a month you let the iPad fully discharge & then recharge to 100%.
How to Calibprice 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 hrs 1 minute. It will certainly charge to 100% in 4 hrs 2 minutes. The brand-new iPad has a bigger capacity battery (42 watt-hours), so making use of the 10W charger will obviously take much longer. If you are making use of your iPad while charging, it will take even longer. It"s ideal to revolve your brand-new iPad OFF and also charge over night. Also look at The iPad"s charging difficulty described http://www.macworld.com/article/1150356/ipadcharging.html
Also, if you have actually a 3rd generation iPad, look at
lutz-heilmann.info: iPad Battery Nothing to Get Charged Up About
lutz-heilmann.info Exlevels New iPad"s Continued Charging Beyond 100% Battery Level
New iPad Takes Much Longer to Charge Than iPad 2
lutz-heilmann.info Batteries - iPad http://www.lutz-heilmann.info.com/batteries/ipad.html
Extend iPad Battery Life (Look at pjl123 comment)
New iPad Slow to Recharge, Barely Charges During Use
http://www.pchuman being.com/article/252326/new_ipad_slow_to_recharge_barely_charges_d uring_usage.html
Best Practices for iPad Battery Charging
Tips About Charging for New iPad 3
How to Save and also Prolengthy the battery life of your new ipad
Prolong battery lifespan for iPad / iPad 2 / iPad 3: charging tips
iPhone, iPod, Using the iPad Charger
Install and also usage Battery Doctor HD
To Extend a Device’s Battery Life, Get to Know It Better
iPad Battery Replacement
In rare instances once using the Camera Connection Kit, you might notification that iPad does not charge after making use of the Camera Connection Kit. Disconnecting and reconnecting the iPad from the charger will solve this problem.