New iPad first recharge - wait until it goes below 10%?

coolwater

macrumors 6502a
Original poster
Jun 8, 2009
722
1
Mine had 91% when it was first opened.

When should I do the first recharge? 10%? 0%? or any time?
 

Starfyre

macrumors 68030
Nov 7, 2010
2,756
971
Charge it up to 100% first at its current state, then let it drain all the way through continuous use. (Can leave your display always on)
 

tmarks11

macrumors 6502a
May 3, 2010
509
32
It is not a NiCd or NiMH battery, both of which had memory problems and responded better to those type of treatments. Just charge it whenever you are ready. My ipad1 is 2 years old, I have always charged the battery whenever I wanted to, and it still has 7 hours of battery life.

You battery will still be going strong when you are ready to buy the iPad5.

battery university said:
Similar to a mechanical device that wears out faster with heavy use, so also does the depth of discharge (DoD) determine the cycle count. The smaller the depth of discharge, the longer the battery will last. If at all possible, avoid frequent full discharges and charge more often between uses. If full discharges cannot be avoided, try utilizing a larger battery. Partial discharge on Li-ion is fine; there is no memory and the battery does not need periodic full discharge cycles other than to calibrate the fuel gauge on a smart battery.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
The only caveat to all that is that the battery management software on the iPad needs a complete discharge cycle periodically to calibrate the "percentage discharge" numbers. Lack of calibration will not affect how long the battery lasts, but either the device may shut down above 2% at some point, or will say you are at 2% when there is plenty of time left on your battery. The iPad shutdown is triggered by low battery voltage rather the calculated "percent discharged".
 
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aypues

macrumors regular
Feb 25, 2012
152
14
San Diego
this is a lithium polymer battery. you dont need to drain it to keep a charge anymore. That was the ni-cd that needed that
 

Craiger

macrumors 6502a
Jul 11, 2007
835
197
"For proper reporting of the battery’s state of charge, be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down)."

From apple's page linked above.
 

xraytech

macrumors 68030
Mar 24, 2010
2,517
208
Use it thru out the day.

Then plug it in to charge before you go to sleep tonight.

Really people, it's not Rocket Science.