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FYI: iPad battery lasts >1000 full charge cycles

D

doboy

macrumors 68040
Original poster
Jul 6, 2007
3,785
2,963
http://www.apple.com/batteries/ipad.html

"Charge Cycles3
A properly maintained iPad battery is designed to retain up to 80% of its original capacity at 1000 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs."

Somehow, I always thought it was 200 full cycles. Maybe that was just my old MacBook Pro battery. :eek:
 
doboy said:
http://www.apple.com/batteries/ipad.html

"Charge Cycles3
A properly maintained iPad battery is designed to retain up to 80% of its original capacity at 1000 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs."

Somehow, I always thought it was 200 full cycles. Maybe that was just my old MacBook Pro battery. :eek:
Click to expand...

It's 400 cycles for iPhone.. iPad and MacBook are 1000 cycles.
 
Yeah I noticed no difference on my iPad 2 after a year of heavy use. I assume there was a slight drop but I was pleased.
 
I'm new to apple, so please excuse my ignorance....

Questions:

1. What is defined as a "Charge Cycle" for iPad 3?
2. Is battery calibration needed on the iPad 3?
 
doboy said:
http://www.apple.com/batteries/ipad.html

"Charge Cycles3
A properly maintained iPad battery is designed to retain up to 80% of its original capacity at 1000 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs."

Somehow, I always thought it was 200 full cycles. Maybe that was just my old MacBook Pro battery. :eek:
Click to expand...

Thanks for this. You learn something new every day :)
 
TauntingBull said:
I'm new to apple, so please excuse my ignorance....

Questions:

1. What is defined as a "Charge Cycle" for iPad 3?
2. Is battery calibration needed on the iPad 3?
Click to expand...

A charge cycle is 100% to 0% then 0% to 100% = 1 cycle
or combination of discharges and recharges.
use 50% then charge to 100% and Use to 50% and charge to 100% = 1 cycle
and so on.

Battery calibration is only needed to synchronize battery and battery meter.

Rodster said:
Can you damage the battery if you leave it plugged in at 100% charge? :confused:
Click to expand...


No it will not damage the battery, but that being said it is better to use the battery a little bit to keep it in good health.
 
It's Lithium-ion Polymer batteries, not some great unknown heh.

They will hold 80% charge after two years unless their charge cycles have been reached.
 
iAmYou said:
A charge cycle is 100% to 0% then 0% to 100% = 1 cycle
or combination of discharges and recharges.
use 50% then charge to 100% and Use to 50% and charge to 100% = 1 cycle
and so on.

Battery calibration is only needed to synchronize battery and battery meter.


No it will not damage the battery, but that being said it is better to use the battery a little bit to keep it in good health.
Click to expand...

Thanks for the info but I always thought a charge cycle = a battery charge regardless of whether the battery level was at 20/50/95% :confused:
 
doboy said:
http://www.apple.com/batteries/ipad.html

"Charge Cycles3
A properly maintained iPad battery is designed to retain up to 80% of its original capacity at 1000 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs."

Somehow, I always thought it was 200 full cycles. Maybe that was just my old MacBook Pro battery. :eek:
Click to expand...

And we DO need as many cycles as possible. My iPad 3, purchased on 03/23 (the day it arrived in Finland), is already at the 60th power cycle. (Displayed by Cydia-based BatteryDetective. For comparison, my iPad 2 purchased over a year ago and used as much as my iPad 3 is only at around 180 cycles.

This all means the battery of our iPad 3's will die on us a lot earlier than the batteries of earlier iPad models.

----------
davenz said:
My macbook has 831 charges and still lasts as long as when i got it.
Click to expand...

Surely it doesn't - prolly you just didn't notice the difference. It's at least 15%.
 
So where do I find out how many charge cycles have I used? I looked all over the general settings but couldn't find it anywhere....
 
I don't know how many charge cycles my iPad has but I've had it for a year and a half, using it every day, and no sign of trouble from the battery. I remember reading that the battery is good for 1000 charge cycles on Apple's website when I got it. I estimated 3 years of use before needing a replacement, but I will probably be ready to buy an iPad 5 by then anyway :D
 
filmbuff said:
I don't know how many charge cycles my iPad has but I've had it for a year and a half, using it every day, and no sign of trouble from the battery. I remember reading that the battery is good for 1000 charge cycles on Apple's website when I got it. I estimated 3 years of use before needing a replacement, but I will probably be ready to buy an iPad 5 by then anyway :D
Click to expand...

I don't think its cycle count is over 200-300. Neither is mine (have used it for several hours a day) - see my prev post on comparing the typical cycle counts for iPad 1/2 and 3.
 
Intell said:
My launch day 3Gs is at about 750 cycles and still holding about 91% of its original capacity.
Click to expand...

You're lucky. My 3GS is at cycle count 541, and the battery only holds 81% (981/1200 mAh) of the (original) charge.

----------
mr-marvin said:
I've charged it around 650 cycles and its still working like its brand new.
Click to expand...

The number of charges (that is, the number of imes you've put the iPad on charger) doesn't equal the cycle count. I don't think yours is over 400 either.
 
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