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Discussion in 'MacBook Pro' started by zooby, May 2, 2009.
Think of charging a battery as filling up a glass of water without the glass having to top over water. At first you pour water quickly and the glass fills, but as you reach the top, you start pouring only drops at a time to prevent spills. Same with the battery, your MacBook is charging it as not to wear out the battery prematurely by overcharging or charging it too fast.
normal. no need for hysteria.
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If it makes you feel better, the first few charge cycles of the macbook air took people ~8-12 hours. But in short, yes, the charging time is normal.
LOL. Well, if it takes almost an hour to charge from 90% to 100% ... then I'm not too far off. Is this just for the few charges? Is this the same for the 2.66 09+ MBPs?
That is a nice analogy. May I use that in the future if it ever comes up for someone and I need to explain?
To the OP: yes, is just for the first few weeks and then the battery starts to charge quicker.
Course you can...
Mmmm hard to say... a month....
I've only had my UMBP 17 for 3 weeks, so take this with a grain of salt
I calibrated it on day 5, and it took 3 hours to charge. I calibrated on day 19 and it took 3 hors to fully charge.
To charge quicker? I don't know, and for me it isn't an issue s I can't help you there. I don't think 3 load cycles is anythign at all to be concerned about. Mnie supposedly had 10 or so, but after calibrating the first time it went back to 2. Think of it as some Chinese worker stress testing your battery for you
I doubt that there is anything wrong with your battery or the system. There is the saying that a watched pot never boils ... or something like that. Anyway, if you stay in OSX and just use your machine you should be very happy with the battery performance. I am amazed at how long you can use the system when it reads less then 15% remaining. Try it. Also as others have indicated, the charge rate is not linear.
Now I have noticed that in BootCamp Window XP the system battery performance appears to be greatly reduced. This is usually blamed on the Nvidia 9600 chip being on line at 100%... again just use the system. I have been using my UMBP sense late October for both work and play and the battery has never been an issue.
mine takes about 2 hours!
I don't think the 3 load cycles is normal... I had 3 MBP's (replacements due to faults!) and none of them had any cycles.
My experience with a MacBook, used mainly off the battery that battery life would decline from 3 1/2 hours to under 2. Calibration helped a bit, but mixed use , with a long period on the mains, brought things back to normal.
I note that Apple do suggest a mix of battery and charger use and my experience suggests this helps a lot. My cycles are around 300 and it is about 14 months old. My capacity is around 90% of new. I suspect that mixed use in this fashin will cure many battery ills.