Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
How Many Cycles Does a MacBook Battery Last
- Thread starter bobber205
- Start date
- Sort by reaction score
You need to calibrate your battery...
100%
Current Capacity: 6902 mAh
Design Capacity: 6900 mAh
Age of Mac: 25 weeks
Battery loadcycles: 28 cycles
Battery temp: 27.3ºC
why should he ? he got more power than ur calibrated battery.....so its holding more power then designed, increasing the time to work on your mac.
Cuz the reading is incorrect thus the capacity might still just be 100% but the reading will say 100%.
Because without calibration, any battery life estimations may be significantly off. The computer can go to sleep because it believes the battery is empty although it isn't, or the computer can mistakenly run all the way until the power goes out without shutting down properly.
I sold my 2009 MBP a few days ago. It had a 103% health, ran for 3-4 hours as it did when purchased and had 12 cycles. Battery was calibrated but still showed 103% health.
My 2010 MB has 222 cycles and is at 86% health. It runs about 3 hours or so.
2008 Blackbook has 196 cycles and is at 98% health. It can run about 3 hours or so.
The point is that each and every battery is different and we can't tell the OP how long a MacBook battery will last.
Awesome, a thread from 2006 
My answer is 189 Cycles. It's a 2008 MBP pre-unibody battery, and has exactly 0% health left. It started dying a few month ago, when it dropped from a solid 80%+ to less than 50%. Now the battery status is "Permanent Battery Failure."
I was fine with the reduced health after almost 4 years, but I didn't expect the battery to die completely.
My answer is 189 Cycles. It's a 2008 MBP pre-unibody battery, and has exactly 0% health left. It started dying a few month ago, when it dropped from a solid 80%+ to less than 50%. Now the battery status is "Permanent Battery Failure."
I was fine with the reduced health after almost 4 years, but I didn't expect the battery to die completely.
Time for a new one! I'd swap it out before it swells, which many seem to do when they get long in the tooth.
Yeah, I actually wanted to ask whether it was safe to leave it inside... I guess this means no. I'm only using it at home, since I got a new 15'' for my daily work. Taking it out will leave the wifi card unprotected.
I'm a bit sad about not using it so much anymore, but it would need a new battery and more RAM, and even then I don't really need two laptops.
An Apple store will take my old battery for recycling, right?
Yes, it does mean no. If it swells, it could damage other parts of your MBP. I wouldn't risk it.
It will also make your MBP run slower if you take it out, which Apple advises against.
I'm not sure if a store would take it, but Apple will: http://www.apple.com/recycling/
631 cycles after 2 years (mid 2009 13" MBP)
down to 77% of original capacity, I'm getting between 3 and 4 hours on a full charge with iTunes and safari mail etc open.
but it doesn't last a train journey anymore, so I'm wondering where you get official apple batteries from?
(mid 2009 13" MBP)down to 77% of original capacity, I'm getting between 3 and 4 hours on a full charge with iTunes and safari mail etc open.
but it doesn't last a train journey anymore, so I'm wondering where you get official apple batteries from?
I'm at 702 cycles on my MBP. I bought it Feb 2011 right before the refresh.
Attachments
Well, it's a MB, but one battery is at 1102 cycles and 89% and the other is at 770 cycles, and currently says 5% but this is the first time I've used it in awhile.
woo!
38 months
1,359 cycles (wow)
capacity 96%
i must doing something right... which shocks me. but i guess i do try to avoid leaving the charger in.
edit: unless i'm not calibrated... i have no clue? but it runs fine and seems to last a while. i always run it until the battery gets down to 2 minutes or so or dies, and then i plug in the charger. (apparently i've done this 1,359 times.) should it be relatively calibrated?
38 months
1,359 cycles (wow)
capacity 96%
i must doing something right... which shocks me. but i guess i do try to avoid leaving the charger in.
edit: unless i'm not calibrated... i have no clue? but it runs fine and seems to last a while. i always run it until the battery gets down to 2 minutes or so or dies, and then i plug in the charger. (apparently i've done this 1,359 times.) should it be relatively calibrated?
Last edited:
I have a 2 week old 13'' MBP. I have 4 cycles on it and the design capacity is 5770 and it's already at 5395, which is 93%. Is this calibrated? I'm pretty disturbed at this seeing how my Macbook 7;1 had far better battery life than this MBP.
The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries. It is perfectly normal if your battery health (maximum capacity) is more or less than 100%, even when brand new, or if it fluctuates up or down over time. For further details, read the CHECKING STATUS AND HEALTH section of the following link.
This should answer most, if not all, of your battery questions:
Try recalibrating it.
My early 2009 MBP has a few hundred cycles (not sure of the exact number but < 400) and is at 72% original capacity. It spent a lot of time plugged in which is why the cycle count seems pretty low, and that probably hurt the battery.
I switched to my spare to see if it helps, but the spare is a $40 one I got from Amazon... and it does weird things.