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crizza0309

macrumors regular
Original poster
Sep 4, 2008
118
0
I don't understand what they mean by that? So after you charge it 1000 times then what?
 
1000 cycles before it starts to show an appreciable drop in full charge power. Note a cycle is a 100% of battery, so if you run it half and then recharge that is only half a cycle.
 
On current Macs, the battery capacity should generally drop to 80% or so after 300 cycles. It often drops like a rock after that point.

No one knows exact numbers, but I think what Phil is saying is that the battery should still be lasting a reasonable fraction of 8 hours (like 80%, which would be 6 h 24 m) after 1000 cycles.

If you put a current MB or MBP battery through 1000 cycles, it would probably last five minutes.
 
So after 1000 it wont last 8 hours anymore?

Kind of, it will start dropping before that, but that will be the average number of cycles before it really starts to fall. But a thousand is a lot, unless you are on batteries all of the time, that is 8,000 hours of use, a year! Or three years if you use it 8 hours a day then charge overnight.
 
Is it bad then if I leave my MBP plugged in for the majority of the day?
 
Is it bad then if I leave my MBP plugged in for the majority of the day?

No, there is a chip in the battery that will stop it charging. But, you should try and use your battery at least once a month, preferably running it right down and recharging fully, to keep it tip top.
 
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