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Discussion in 'MacBook Pro' started by crizza0309, Jan 6, 2009.
I don't understand what they mean by that? So after you charge it 1000 times then what?
On the 1001st time it will leak dangerous and noxious gases.
Batteries typically have less charge after a couple hundred cycles. They've just made it longer lasting in life to make up for the fact that it's not user replaceable.
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.
So after 1000 it wont last 8 hours anymore?
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.
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.
After 1000 they can't guarantee it won't blow up, disintegrate, whatever.
It probably won't last 8 hours anyways. 6 if you're lucky.
Is it bad then if I leave my MBP plugged in for the majority of the day?
Nope. You don't need to use it on battery just because it is there. I say to use AC power whenever possible with a laptop.
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.