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View Poll Results: yay or nay?
Calibration YES!!!!!!!! 86 66.67%
Calibration NO!!!!!!!!!! 43 33.33%
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Old May 11, 2008, 09:10 AM   #1
7on
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iPhone battery calibration? Yay or Nay?

Do/did you calibrate your iPhone battery?
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Last edited by 7on; May 11, 2008 at 09:25 AM.
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Old May 11, 2008, 09:21 AM   #2
nickspohn
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no.
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Old May 11, 2008, 11:11 AM   #3
genshi
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yes.

I guess that's why I'm not having the same issues some other people are having of drained batteries and always having to charge. I can go at least a couple of days of moderate use (a few phone calls, watch a video, listen to lots of music, google maps, etc.) without always having to charge (with WiFi always being on, screen brightness turned up, etc.)

My routine when I do charge is, I just plug it in for a couple of hours when I get home from work, then when I get the "Full Charge" symbol, I unplug and lay the iPhone by the bedside night stand (unplugged) to use as my alarm clock in the morning.
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Old May 11, 2008, 11:19 AM   #4
jakeacc
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huh

How does one properly "calibrate" a battery? Just let it drain to empty?
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Old May 11, 2008, 12:36 PM   #5
Julien
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Originally Posted by jakeacc View Post
How does one properly "calibrate" a battery? Just let it drain to empty?
Was going to ask the same question but this must be it. However you should only drain the battery completely about once a month at the most. Completely draining a lithium-ion battery causes crystals to grow and diminishes over all battery life.

EDIT: A quick Google and found a great article.
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Old May 11, 2008, 12:44 PM   #6
genshi
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Originally Posted by Julien View Post
Was going to ask the same question but this must be it. However you should only drain the battery completely about once a month at the most. Completely draining a lithium-ion battery causes crystals to grow and diminishes over all battery life.

EDIT: A quick Google and found a great article.
Yep, I've only completely drained it 3 or 4 times since the day I got it (which was the first day it was released) but the first time I did this was within the first week. It seemed to have made a difference (or I just got lucky.) Coming up on a full year with my iPhone and still no issues at all.
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Old May 11, 2008, 12:49 PM   #7
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Oddly enough mine came fully charged.

I'm usually a stickler about battery calibration, but I've was syncing and what not off an on the first couple days i got my iphone. It was so hard not to.
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Old May 11, 2008, 12:50 PM   #8
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Completely draining Li-ion batteries will decrease battery life, don't do it.
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Old May 11, 2008, 01:21 PM   #9
Julien
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Originally Posted by Chrysaor View Post
Completely draining Li-ion batteries will decrease battery life, don't do it.
True, but you need to reset the control electronics (battery fuel gage) about every 30 cycles or so. If not it will "think" the battery is dead and shut off before it actually is.

Please read the article I liked to. It has some great info.
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Old Jul 9, 2009, 09:44 PM   #10
mattyb527
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Yes, Calibration of iPhone is Crucial to extend the life of you battery!!

Apple states that is is very important to calibrate it at least once a month.

The following is a quote from Apple's website:

"Use iPhone Regularly. For proper maintenance of a lithium-based battery,
its important to keep the electrons in it moving occasionally.
Be sure to go through at least one charge cycle per month
(charging the battery to 100% and then completely running it down)."

http://www.apple.com/batteries/iphone.html
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Old Jul 9, 2009, 10:10 PM   #11
danpass
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yes and my experience with Li-ions over the years bear out the advantages of calibrating.
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Old Jul 9, 2009, 10:21 PM   #12
iLoveiPhone3GS
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Absolutely YES! It is better for the health of the battery to calibrate it atleast once a month. I do the same with my UMB.
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Old Jul 9, 2009, 10:22 PM   #13
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Quote:
Originally Posted by Chrysaor View Post
Completely draining Li-ion batteries will decrease battery life, don't do it.
Not true. See the apple website about batteries and calibration. You should do this every month or so.
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Old Jul 9, 2009, 10:24 PM   #14
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I calibrated and my battery still sucks...cant even get through a day. Not to mention that it shuts off at 60%.
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Old Jul 9, 2009, 10:27 PM   #15
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Old Jul 9, 2009, 10:29 PM   #16
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Originally Posted by noodle654 View Post
I calibrated and my battery still sucks...cant even get through a day. Not to mention that it shuts off at 60%.
Wow that's bad. What have you tried other than calibration? Recover? If so, you definitely need to take it back to the store.
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Old Jul 9, 2009, 10:33 PM   #17
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I think the idea people are missing is that calibration isn't going to improve your battery's performance. If your battery sucks performance-wise, calibration will do nothing for you. Take it back and get it replaced.

All you're doing with a calibration is making the graphical representation of your battery (upper right battery image) more accurate.
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Old Jul 9, 2009, 11:28 PM   #18
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I do it with my macbook every 3 weeks or so. Don't feel like dishing out almost 200 bucks for a new battery. I think I'm going to do start doing this with my iphone. My phone is my only way to get ahold of people at times so I don't like doing it.
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Old Jul 10, 2009, 12:01 AM   #19
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Thumbs up Yes!

Yes.

On a monthly basis i do, battery back up has remained excellent and meter predictable after 1 year of regular usage. iPhone 3G.

Sony Vaio 3 years and going strong with close to 7 hours back up.
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Old Jul 18, 2009, 12:54 PM   #20
iMrNiceGuy0023
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I just got my 3GS, so I just let the battery run down completely to get a better battery life?
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Old Jul 18, 2009, 03:25 PM   #21
Mikey B
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I was never a believer in iPhone battery callibration but I just did allow my 32GB 3GS to be charged completely, drain completely and re-charged and I noticed an immediate improvement in battery life.
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Old Jan 16, 2011, 08:05 PM   #22
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Does anyone know if the iPhone actually shuts itself off before the battery is "drained"? Blackberries have that automatic shut off when it reaches a low percent and I am wondering if the iPhone is the same, so when we are thinking we have drained it to shut off, it actually still has battery life left?
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Old Jan 16, 2011, 10:12 PM   #23
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Originally Posted by tofuramen View Post
Does anyone know if the iPhone actually shuts itself off before the battery is "drained"? Blackberries have that automatic shut off when it reaches a low percent and I am wondering if the iPhone is the same, so when we are thinking we have drained it to shut off, it actually still has battery life left?
it shutsdown at 2-3% then then forces your to charge
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Old Jan 16, 2011, 10:19 PM   #24
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I never made a conscious effort to do it with my original iPhone...I just used it (lots of "quick" and random charges); I guess the closest thing to recalibration was if the phone just died on me while I was out and just let it fully recharge later (however not a frequent occurrence). That phone was purchased in 08 and still holds a strong charge.
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Old Jan 17, 2011, 12:10 AM   #25
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Originally Posted by Leet Apple View Post
it shutsdown at 2-3% then then forces your to charge
So calibrating would start from 2-3% battery? Or is there another way to have the iPhone truly drain to 0%?
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