How Many Cycles Does a MacBook Battery Last

[secretpact]

Here's me (had my blackbook since May 2007):

75 cycles, 100% capacity.


How long is apple going to be selling brand new batteries for the blackbook? I plan on keeping this laptop for a long time, and I may need a new battery a few years from now.

 

[heatmiser]

How long is apple going to be selling brand new batteries for the blackbook? I plan on keeping this laptop for a long time, and I may need a new battery a few years from now.

They still sell G4 Powerbook/iBook batteries, so I'd say at least two years after the model goes out of production.

 

[sidharth80]

Here are my macbook stats -
Cycles - 50, health - 100%

 

[Justinerator]

Figured this might help...

I got my mbp december 06. It has 142 cycles and it is at 93%... I would say that's pretty good

 

[hulugu]

65 cycles 3 months, 106% health

Original capacity 5020 mAh 100%
Current capacity 5345 mAh 106%

Battery Health Monitor

Well, that can't be right.

 

[Bobioden]

Well, that can't be right.

Well, that is what is says. I use it every day on Battery power. When it runs down I plug it in. I have been doing this since I got it the end of November. I can get 4 1/2 hours out of each charge.

[/IMG]

 

[hulugu]

Well, that is what is says. I use it every day on Battery power. When it runs down I plug it in. I have been doing this since I got it the end of November. I can get 4 1/2 hours out of each charge.
...

I'm just saying a battery can't be more than at 100% capacity or health. There's a miscalculation in there somewhere.

 

[thejadedmonkey]

I'm just saying a battery can't be more than at 100% capacity or health. There's a miscalculation in there somewhere.

If it's designed for 5,300mAh and it can deliver 5,350, it's delivering over 100%

 

[hulugu]

If it's designed for 5,300mAh and it can deliver 5,350, it's delivering over 100%

But, wouldn't that mean it's overcharging? Thus, something is not wrong, but odd?

 

[skyrider007]

My battery health is 94% at 27 cycles, is this bad for a 8-month old MBP?

 

[AndyK]

 

[skyrider007]

Andy, how do you do that?!

 

[AndyK]

Andy, how do you do that?!

Do what?

 

[skyrider007]

Do what?

100% health

 

[AndyK]

I've only had it a month.

 

[skyrider007]

I've only had it a month.

That explains it

 

[AndyK]

I should probably have pointed that out when I posted the screenshot.

 

[SFStateStudent]

This is mine...

bought MacBook 2.16 the end of August '07, though there are some discrepancies between, both pretty accurate information. Just not sure the difference between Coconut's Battery-Loadcycles and Cycle Count in my System Preferences:

Battery Information:

Model Information:
Serial Number: DP-ASMB016-36f0-31c2
Manufacturer: DP
Device name: ASMB016
Pack Lot Code: 0002
PCB Lot Code: 0000
Firmware Version: 102a
Hardware Revision: 0500
Cell Revision: 0200
Charge Information:
Charge remaining (mAh): 4755
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 4787
Health Information:
Cycle count: 28
Battery health: Good
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 12551

Coconut Battery 2.5.1
Current Battery Charge: 4755 mAh
Max Battery Charge: 4784 mAh
99%
Current Battery Capacity: 4787 mAh
Original Battery Capacity: 5200 mAh
92%
Additional Info
Battery-Loadcycles: 5
Age of Mac: 7 Months
Charger connected: No
Battery is Charging: No

 

[MacDann]

If I recall from the battery recall a year ago, Apple considers 300 cycles to be typical for the life of a notebook battery. I think that was one of the criteria they were using to judge whether or not they would replace your battery of it had failed prematurely.

MacDann

 

[TJones]

Mine went from 100% to 96% after doing the calibration and it has less than 40 cycles on it

 

[MacDann]

Mine went from 100% to 96% after doing the calibration and it has less than 40 cycles on it

And they will - after it's charged for a day or two and cycled again it will come up somewhat. Mine always do.

Remain calm - don't panic.

MacDann

 

[ziekke]

But, wouldn't that mean it's overcharging? Thus, something is not wrong, but odd?

It just means the battery is rated for 5200mAh.. when the battery is produced it likely charges up more than 5200 mAh.

It's like a CPU, when they are made they are made to exceed the rated clock speed, that way the CPU will run stable at the clock speed they want to sell it at (this is what makes overclocking mostly possible).

So just because the battery says it's 5200mAh just means that when it ran off the line, it's capacity met or exceeded it, so it could be sold as such.

 

[hulugu]

It just means the battery is rated for 5200mAh.. when the battery is produced it likely charges up more than 5200 mAh.

It's like a CPU, when they are made they are made to exceed the rated clock speed, that way the CPU will run stable at the clock speed they want to sell it at (this is what makes overclocking mostly possible).

So just because the battery says it's 5200mAh just means that when it ran off the line, it's capacity met or exceeded it, so it could be sold as such.

So, odd as in unusual.

 

[e12a]

"Battery Lifespan

A properly maintained Apple notebook battery is designed to retain up to 80% of its original capacity at 300 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs."

http://www.apple.com/batteries/notebooks.html

i got my battery replaced under warranty on my old Macbook Pro. After a year and 68 cycles, i had 34% health and no more than an hour of working time.

 

[dops7107]

Mine's only two weeks old and it's on 98% health already (6 cycles). Come to think of it... it never showed 100% Oh well, it hardly matters, it still lasts a good time.