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10.4: View battery cycle count in System Profiler System 10.4
Tiger only hintI happened to be poking around in Tiger's System Profiler.app, and noticed that it has a battery cycle count listed, among other battery information in the Power section under Hardware. Knowing this might be useful for people deciding whether they can live with their current *Book -- or at least with their current battery -- until Intel-based *Books appear.

[robg adds: I'm pretty sure this is new to Tiger, so I've marked it 10.4 only; if I'm wrong, please let me know. With prior versions of OS X, you had to use ioreg to get cycle count info, as explained in this hint.]
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10.4: View battery cycle count in System Profiler | 14 comments | Create New Account
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10.4: View battery cycle count in System Profiler
Authored by: croasmun on Jun 24, '05 02:18:31PM

Anyone have any idea what the average life span of a battery is in terms of numbers of battery cycles?



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10.4: View battery cycle count in System Profiler
Authored by: nick on Jun 27, '05 05:50:03AM

my sysprofiler reads like this:

Full Capacity (mAh): 328
Current (in mV): 12572
# Zycles: 234

this is about 10 min left with fully charged batterie. my 12''PB is 18 months old. gotta by a new batterie soon :(



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10.4: View battery cycle count in System Profiler
Authored by: styrafome on Jul 07, '05 11:55:19PM
There is some battery cycle information here:
How to Prolong Lithium-Based Batteries

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10.4: View battery cycle count in System Profiler
Authored by: geezusfreeek on Jun 24, '05 02:36:06PM

Does this show how many cycles are remaining or how many the battery has gone through already?



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10.4: View battery cycle count in System Profiler
Authored by: Felix on Jun 24, '05 03:35:22PM

>>Does this show how many cycles are remaining or how many the battery has gone through already?

Cycles the battery has gone through to date. BTW, it's not merely the number of times you've plugged in the recharger; rather, the equivalent number of full discharge/recharge cycles.

Couple of Apple web pages on the subject:

http://www.apple.com/batteries/

http://www.apple.com/batteries/notebooks.html

"Battery Lifespan
A properly maintained PowerBook or iBook battery is designed to retain up to 80% of its original capacity after 300 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs."

"A charge cycle means using all of the battery's power, but that doesn't necessarily mean a single charge. For instance, you could listen to your iPod for a few hours one day, using half its power, and then recharge it fully. If you did the same thing the next day, it would count as one charge cycle, not two, so you may take several days to complete a cycle. Each time you complete a charge cycle, it diminishes battery capacity slightly, but you can put both notebook and iPod batteries through many charge cycles before they will only hold 80% of original battery capacity. As with other rechargeable batteries, you may eventually need to replace your battery."



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10.4: View battery cycle count in System Profiler
Authored by: scatlin on Jun 24, '05 03:58:52PM

There was a previous posting telling how to get this information from the ioreg command:

<code>ioreg -l | grep Capacity</code>

The count mentioned is how many cycles have been rather than will be. I'm glad they added this to the System Profiler in Tiger, but for those of us who are still Panther users, ioreg is the answer.



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10.4: View battery cycle count in System Profiler
Authored by: n1mie on Jun 24, '05 04:21:37PM

This is all well and good. I noticed, however, that mine lists a piece of information that I would like to change: First Low Level Warning is NO. This explains in part why the OS reports my capacity off and never warns me when it gets low (just suddenly shuts off at 84% life remaining).

Any ideas on how to change a parameter (like the NO to YES)?

---
--Chip



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10.4: View battery cycle count in System Profiler
Authored by: ebernet on Jun 24, '05 05:12:13PM

I think that means that the low level warning has not been issued yet in this power cycle, so you would have to have just a couple of minutes left on your battery to see something different.



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First Low Level Warning = "NO"
Authored by: rajoftherings on Jun 24, '05 05:35:25PM

I noticed this as well. The feature that sets off the low level alarm seems to have been broken around 10.3.8 if I recall correctly. I was hoping that it would be fixed in Tiger, but not so far.

I would also be interested in knowing how to turn the low level warning back on -- it's not through the Energy Saver pref panel....

Any help would be much appreciated!



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First Low Level Warning = "NO"
Authored by: hamarkus on Jun 25, '05 01:21:26AM

As usual, what might be broken or not broken in such hardware related software functionality depends on which hardware you have: with my TiBook 1 Ghz (cycle count 141), I still get the low battery warning, even under 10.3.9.



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10.4: View battery cycle count in System Profiler
Authored by: zane on Jun 24, '05 06:43:51PM

Ditto. I get no battery low-level warning at all anymore (I used to), just a sudden sleep cycle (or Shutdown, in some cases).

Then again, my battery shows around 10hrs remaining on a full charge and dies at around 8.5-9hrs indicated remaining... which is a little screwy. ;)

I guess I'm due for a new battery (and it's only had 208 cycles according to System Profiler)



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10.4: View battery cycle count in System Profiler
Authored by: rpenzenik on Jul 07, '05 09:12:59PM

That's odd. My battery also shows 208 cycles. What are the chances of that happening. Does anybody else show 208?



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10.4: View battery cycle count in System Profiler
Authored by: blizz1975 on Jun 25, '05 04:41:31PM

I had the same problem with a Titanium Powerbook. I took it to the Apple Store and they replaced the battery. My Aluminum Power Book has the same setting as yours set to no and I still get the warning. If your machine is less than a year old you can probably get a new battery free of charge. Even with AppleCare they don't like to replace batteries after a year, it seems. In fact my battery has been losing capacity and they don't want to replace it. Your problem is probably with the chip on the battery not communicating properly to the Power Manager and that should get a replacement. Good Luck ;-)



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10.4: View battery cycle count in System Profiler
Authored by: jonn8n on Jun 24, '05 05:08:32PM
For those who want a quick and easy way to get info about their battery (including cycles--if the info is available to the system), check out my freeware (and fully editable) script:

Battery Info

Jon

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