Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

fondo890

macrumors newbie
Original poster
Jun 8, 2009
18
0
I have read that the battery only has a certain amount of charge cycles. So say I charge my phone too 100% at night, and then after I use it in school it is at 50%, so I charge it up to 70% in the car before work. Then after work it is at 30% so I charge it up to 50% before I go out to the movies. When I get back it is at 20% and then I charge it over night back to 100% for then next day. Is that 4 charge cycles out of the 500(ish) you can get, or is that one since they aren't FULL charges? What is your experience with doing things similar to this?

(I know I won't use 30% of the battery at the movies and it may not charge 20% that fast, this is just hypothetical. :D)
 
So that entire day of charge a little and discharge a little is only one full charge? That makes me feel better! Thanks!
 
charge my phone too 100% at night
Start the day at 0 charge cycles...

after I use it in school it is at 50%, so I charge it up to 70%
That's 20% of one cycle...

after work it is at 30% so I charge it up to 50%
Plus 20% of one cycle...

When I get back it is at 20% and then I charge it over night back to 100%
Plus 80% of one cycle.

So in total, you've charged your battery 120% over the course of one day... that's only 1.2 out of your 500 or so charging cycles. Still, this is a pretty heavy amount of charging. If you were to do this every day, after just 15 months or so you could expect your battery performance to be significantly reduced.
 
Oops- I just looked it up and I was actually wrong, its 400.

"Charge Cycles
A properly maintained iPhone battery is designed to retain up to 80% of its original capacity at 400 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs."

From http://www.apple.com/batteries/iphone.html (look on the right side)
 
You're better off not worrying about it. I try to not keep myself worried about the battery. It'll die sooner or later but that later will probably be when I get a new phone.
 
ABC I like that one!

And Warbrain thats true! Especially since I will probably end up getting the next iPhone to be released which will mostly likely be in about a year! I think this new battery percentage thing is also getting everyone to notice their battery more. Oh well.
 
Oops- I just looked it up and I was actually wrong, its 400.

"Charge Cycles
A properly maintained iPhone battery is designed to retain up to 80% of its original capacity at 400 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs."

From http://www.apple.com/batteries/iphone.html (look on the right side)

You're still wrong.

A properly maintained iPhone battery is designed to retain up to 80% of its original capacity at 400 full charge and discharge cycles.

At 400 full charge cycles, it should still be able to retain 80% of original capacity. So... longer than 400 full charge cycles.
 
You're still wrong.



At 400 full charge cycles, it should still be able to retain 80% of original capacity. So... longer than 400 full charge cycles.

So this means that 400+ charge cycles, the battery life is basically reduced to 80% of it's original capacity? Someone clarify this for me.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.