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3924 Views 7 Replies Latest reply: Jan 3, 2009 2:01 PM by Xraider
Currently Being ModeratedDec 30, 2008 6:41 AM (in response to savonarola)A battery "cycle" is (roughly) equivalent activity to that which would drain the battery fully. So one cycle can be accumulated by:
- draining the battery from 100% to 0% one time
- draining the battery from 100% to 50% and then recharging to 100% twice
- draining the battery from 100% to 90% and then recharging to 100% ten times
Net-net: your machine is fine...no worries.24" iMac 2.8GHz, 2.4GHz AlMB, Mac OS X (10.5.6)
Currently Being ModeratedDec 30, 2008 9:30 AM (in response to NickFro)hi. thanks for the prompt response.
Given those situations where cycles are counted, what is the best way to lessen the battery cycle count for my battery (and at the same time keep its help at 100%, or something close)?
thanks!Macbook Alum 2.0, Mac OS X (10.5.6)
Currently Being ModeratedDec 30, 2008 12:22 PM (in response to savonarola)You can't. Your battery will (unless your machine is always on AC power, which is, in and of itself, not terribly healthy for your battery) cycle. After about 500 cycles or so, its capacity ("health") will diminish to 70-80% of its current capacity (best case). Eventually, you will need to buy a new battery -- this isn't avoidable -- it's the way batteries work.
Apple has a detailed discussion here: http://www.apple.com/batteries/24" iMac 2.8GHz, AlMacBook 2.4GHz, Mac OS X (10.5.6)
Currently Being ModeratedDec 30, 2008 1:19 PM (in response to NickFro)Please check other forums that are in the Battery section. There are many people who ask the same question and it has been answered many times.
In regards to your specific question, you cannot reduce the cycle count, keep the health at 100% forever, or keep the Mac on the charger at all times.
The battery will stay at 100% health for a long time and very slowly go down from that until around 75% which then the battery will lose health faster. A good Mac battery will maintain close to 100% for 300 cycles.
If you are in warranty and your battery drains fast, a genius will replace your battery if the full charge capacity is under the threshold.2.4 Ghz Aluminum MacBook | Whitebook 2.1 Ghz, Mac OS X (10.5.6), iPhone 3G | 16GB
Currently Being ModeratedDec 31, 2008 7:41 AM (in response to NickFro)when I asked how to "lessen" the cycle count, I meant how do I keep it from rapidly increasing, because that would entail losing precious battery health.Macbook Alum 2.0, Mac OS X (10.5.6)
Currently Being ModeratedDec 31, 2008 7:49 AM (in response to savonarola)The only way to keep it from increasing (I suppose) would be to almost always use the machine on AC power, cycling the battery perhaps once a month to maintain its overall condition (read Apple's battery site for more details).
But it's honestly not worth worrying about.
You have a notebook computer with a battery. Eventually that battery will need to be replaced. And eventually is probably in 2-3 years, not next week.24" iMac 2.8GHz, AlMacBook 2.4GHz, Mac OS X (10.5.6)
Currently Being ModeratedJan 3, 2009 2:01 PM (in response to NickFro)Oops... scratch that last comment... i just called applecare again b/c i was really ticked... Apparently, the first applecare rep was misinformed. My battery is indeed covered!