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Old Aug 13, 2006, 10:48 AM   #1
bobber205
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How Many Cycles Does a MacBook Battery Last

When should I expect to replace my macbook battery. I would say 2/3 the time I use my machine (on almost all the time) it's from the adapter. But when I use the battery for power, I usually use the machine until the battery is more than 50% gone.

Right now my iStat says me battery has "41 Cycles". How many will/should it last? How much should I expect to replace it?
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Old Aug 13, 2006, 11:14 AM   #2
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I'm using a 15" powerbook that has gone through 288 cycles and is at 92% of its original capacity after 18 months. You can keep an eye on things with coconut battery if you're worried about it. It's a nice little app. I'd say you've got a lot of life in your battery, yet.
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Old Aug 13, 2006, 11:27 AM   #3
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i've done over 100 cycles and it's still as good as new.
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Old Aug 13, 2006, 11:37 AM   #4
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41 Cycles and I'm at 99%. Not bad!
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Old Aug 13, 2006, 11:42 AM   #5
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288 cycles 98% via coconut battery
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Old Aug 13, 2006, 11:50 AM   #6
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19 cycles 100% capacity
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Old Aug 13, 2006, 11:58 AM   #7
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how come mine has only 95% after 3 cycles?
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Old Aug 13, 2006, 06:50 PM   #8
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Mine's 94% after five. Man, I'm getting ticked. I never had over 5000mAhs on my Macbook, and everyones seems to be higher. YET, I can get nearly four hours before it dies. Something wrong with the sensor?
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Old Aug 13, 2006, 07:24 PM   #9
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As long as you do your monthly calibration you should be fine!
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Old Aug 13, 2006, 07:35 PM   #10
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1gHz Ti-Book..

82 percent of the original Capacity.
Original 4200 mAh
Current 3480 mAh

Loadcycles 871 !!
Age of mac 44 months.


Guess I'm doing ok
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Old Aug 13, 2006, 08:09 PM   #11
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Quote:
Originally Posted by coastertux
As long as you do your monthly calibration you should be fine!
Doesn't work for me.
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Old Aug 13, 2006, 08:21 PM   #12
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Quote:
Originally Posted by drake
Doesn't work for me.
apparently me either
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Old Aug 13, 2006, 08:28 PM   #13
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Listen to this peeps. 20 Cycles: 29% 1462 mAh.

Needless to say I have a new MacBook battery in the mail.
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Old Aug 13, 2006, 09:08 PM   #14
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Quote:
Originally Posted by JosiahPB
20 Cycles: 29% 1462 mAh.

.

hot do you find out the info?

ps i am a n00b when it comes to laptops
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Old Aug 13, 2006, 09:31 PM   #15
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Quote:
Originally Posted by furious
hot do you find out the info?

ps i am a n00b when it comes to laptops
download and run an application called "coconutbattery" and it tells you everything
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Old Jan 6, 2008, 06:15 PM   #16
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Mine is down to 75% after 148 cycles and 16 months. Should I be asking questions?
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Old Jan 6, 2008, 06:22 PM   #17
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Quote:
Originally Posted by JordanNZ View Post
1gHz Ti-Book..

82 percent of the original Capacity.
Original 4200 mAh
Current 3480 mAh

Loadcycles 871 !!
Age of mac 44 months.


Guess I'm doing ok
My powerbook is at 70 months and well into its second battery. I guess you are doing ok. Go Titanium!

For the record:
Battery health: 76%
Current: 3220 mAh
Original: 4200 mAh
136 loadcycles
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Old Jan 6, 2008, 06:39 PM   #18
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Quote:
Originally Posted by skunk View Post
Mine is down to 75% after 148 cycles and 16 months. Should I be asking questions?
Thats about what mine is at too and I think its just normal heavy battery usage. I get about 3hrs still on the 15" MBP.
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Old Jan 6, 2008, 07:40 PM   #19
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mine is about 5 months old, only 4 cycles (and i use it on battery ALL the time), and i am actually at 5321mAh, more than the original 5200. I think part of it is that almost every time I unplug it, i don't plug it back in until it puts itsself to sleep. and every 2 weeks or so, i disable hibernation with insomniax and let it die completely. make sure that whenever u discharge, let it get as low as you can whenever possible, and when u recharge, charge it up to 100 percent. everytime i do this, the capacity creeps up a bit. I did this with my 5 year old compaq and still am getting 80% life out of the original battery.
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Old Jan 6, 2008, 08:42 PM   #20
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Quote:
Originally Posted by coastertux View Post
As long as you do your monthly calibration you should be fine!
is over-calibration is harmful?

When my battery dies, I plug it in and charge it, use it until the battery dies, and this process goes on forever.....

is this considered "calibrating" my battery? If so, is this bad since I run out of battery every day or two; hence, im calibrating my battery every other day instead of once a month?

Apple says calibrating your battery requires you to leave it without power for 5 hours. Does this mean what I am doing is not harmful to my battery?
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Old Jan 6, 2008, 08:46 PM   #21
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Quote:
Originally Posted by hari-bhari View Post
mine is about 5 months old, only 4 cycles (and i use it on battery ALL the time), and i am actually at 5321mAh, more than the original 5200. I think part of it is that almost every time I unplug it, i don't plug it back in until it puts itsself to sleep. and every 2 weeks or so, i disable hibernation with insomniax and let it die completely. make sure that whenever u discharge, let it get as low as you can whenever possible, and when u recharge, charge it up to 100 percent. everytime i do this, the capacity creeps up a bit. I did this with my 5 year old compaq and still am getting 80% life out of the original battery.
According to the pic you attached, your charger is not connected yet your battery is charging. How is this possible?
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Old Jan 6, 2008, 09:49 PM   #22
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My battery has done 150 cycles and is at 84%
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Old Jan 6, 2008, 09:58 PM   #23
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Coconut battery produces incorrect stats in Leopard.

Better to use Battery Health Monitor, or simply go to System Profiler -> Hardware -> Power.

According to Apple, a well-maintained battery should retain 80% capacity at 300 cycles (it's noted in a document on the Apple support site).


A few weeks ago, my battery was reporting 54% capacity at 300 cycles exactly. Went to an Apple store, and got a new one without problem (they used System Profiler). Heck, they didn't take my serial # or other information.

Hope this info helps.
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Old Feb 22, 2008, 12:20 AM   #24
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Quote:
Originally Posted by skunk View Post
Mine is down to 75% after 148 cycles and 16 months. Should I be asking questions?
You know, mine seems to be steadily declining. iStat says 70% health with 249 cycles after 12 months. 3862mAh.

WTF?

I'm getting a new battery.

EDIT: After reading tip's comment above, I'm more convinced. BTW, iStat's information matches the data from System Profiler; the data from Coconut is wonky, according to it my battery has experienced only 7 load-cycles.
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Old Feb 22, 2008, 12:43 AM   #25
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65 cycles 3 months, 106% health

Original capacity 5020 mAh 100%
Current capacity 5345 mAh 106%

Battery Health Monitor
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