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When to charge an iPad 3?
- Thread starter mark28
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+1, I hope you guys will change your charging habit. You are serious damaging the battery by waiting until the last minute to charge it.
The rule is that it doesn't really matter a fudge. Go through at least one charge cycle a month and you'll keep the battery generally healthy. At least once a month let it drain completely (or near enough) and charge it back up again.
In other words, the question that's really being asked here is "is it ok for me charge my iPad regularly or simply when I want to" and the answer is yes but for the small caveats above.
In other words, the question that's really being asked here is "is it ok for me charge my iPad regularly or simply when I want to" and the answer is yes but for the small caveats above.
When you drain a better to 0 and recharge it to 100% that is one battery cycle. Each battery has a certain amount of battery cycles until the battery starts to be bad (have 80% of stock spec). I would advise you to charge when ever the battery drops below 75% and you are around an outlet.
I throw mine on the charger most nights. Don't always need to though or I'll forget sometimes, but it's fine because it can usually go two days or more. I can kill it in a day though, and high usage can make me charge it early.
If you let battery drain to 90% and then recharge it, after 10 times, you have completed ONE battery cycle, so there is no difference there.
The one big difference is that when the charge level is at 0% or near 0%. You are doing a lot more damaging than when the battery charge level is sitting at 50%. So you are killing your battery faster this way.
How is charging a battery at under 10% damaging it?
I am not a chemist, I don't know how the chemistry inside a battery work. But it is a well known fact that partial discharge reduces stress and prolongs the Lithium Ion battery life.
Code:
Depth of discharge Discharge cycles
--------------------- -------------------
100% DoD 300 – 500
50% DoD 1,200 – 1,500
25% DoD 2,000 – 2,500
10% DoD 3,750 – 4,700As you can see, doing regular recharge can prolong your battery life up to 10 times.
Nope, I am planning to use my iPad 3 for a long time. And I don't want to buy a new iPad just because of the battery reaches the end of life first. I want the option to upgrade my iPad when I choose to. And frankly, charging your iPad frequently is not that hard.Seriously, by the time the battery fails you'll be on the iPad 5. As the song says, "don't worry be happy".
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I'll let you draw your own conclusions:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
From Here:
http://www.cerdec.army.mil/directorates/docs/cpi/Cycled_Aged_LiIon_Cells.pdf
It seems looking at chart best to recharge below 50%, and worst if above 50%?
Fortunately, or unfortunately as the case may be, I use my iPad A LOT. Whether it be games, internet or watching movies; I pretty much plow through the battery every day. Usually by nighty night time my battery is in the single digits so I'll generally do something until the battery dies or just plug it in if it's around 5% or so. By morning the iPad is fully charged and good to go.
What the chart and the BatteryUniversity links are both saying, is that maintaining high voltages (at or near 4.2V full charge status) stresses a Li-ion.... and from my interpretation, significantly more so than deep discharges, or running down to the 0% cut-off point.
I charge my iPad on a light timer and generally keep it between 20-80%, I expect to use it well over 4 yrs (I'm well over 3 yrs on my iPhone 3G).
The correct answer is to charge it whenever you can. The more you have it plugged in the better, because it will reduce charging cycles. If you plug it in at 90% you will only have 10% of a cycle.
Seriously, by the time the battery fails you'll be on the iPad 5. As the song says, "don't worry be happy".
So true... the majority of people arguing about this will never see the damage caused by a poorly maintained battery, as they'll be three newer iterations deep by the time the battery fails.
