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Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: hal
Date: July 10, 2019 04:27PM
I don't know why it never occurred to me before... but apple had always said that a MBP battery should last 1000 cycles before losing its performance. I have seen 100s of MBP used batteries. The number of fully functioning batteries with 1000 or more cycles I can count on one hand. On the other hand... I've seen DOZENS of batteries die of old age long before 1000 cycles. I'm thinking that a better lifetime expectation number would be more like 500-600 cycles. I'm talking about the 13,15 & 17" models of 2009-2012 unibody MBPs - I don't have enough experience with the retina display models.

How many cycles did YOU battery have when you replaced it?
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: Lew Zealand
Date: July 10, 2019 04:54PM
I've seen a number of them with <400 cycles in the "Service Battery" state, sometimes even with ~120 cycles. As far as I can tell, this comes from underusing the battery. Pretty much all the early battery failures we see are from computers permanently left charging so the battery never gets used. The batteries with regular use go over 700-800 cycles (I have one at home like this) and the computers are replaced before the battery is.

An iPhoney example of a different kind of battery use:

A co-worker of mine got the same iPhone that I did, a few months later than me. I baby my battery according to best practices (more as a mental exercise than anything) while he puts in regular phone battery (ab)use. 2.5 years later, Battery Health rates my battery at 94% and his at 84%.

Only difference is in the method of battery use.



Edited 1 time(s). Last edit at 07/10/2019 04:55PM by Lew Zealand.
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: OWC Larry
Date: July 10, 2019 05:37PM
I would concur - laptops utilized as desktops with infrequent travel see battery longevity in the tank. On used laptops from students - we do see high battery cycles on healthy batteries cause being used as a laptop.



OWC Larry
Other World Computing
[www.macsales.com]
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: space-time
Date: July 10, 2019 06:25PM
Wife had a white macbook with some sleep sensor issues, it would not go to sleep unless you closed the lid. If you left it open on the table, screen would dim but machine would not actually sleep (yes, I checked all settings, zapped PRAM, etc). This was back in the days when OS updates were about 3 years apart, so I didn't have a reason to nuke and pave. She would go through at least one cycle per day. After 3 years she had 1200 cycles. I took the machine back to Apple Store to replace the upper case which would crack and Apple had a repair program. When I showed the genius that the battery had 1200+ cycles and more than 90% capacity, he was also surprised.
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: Ombligo
Date: July 10, 2019 06:29PM
My MBP got a service battery notice almost immediately on putting installing my last Newertech battery. I figured Apple just didn't recognize the aftermarket battery and ignored it. That was 710 cycles ago and I am still getting 4-5 hours on a charge.



“No persons are more frequently wrong, than those who will not admit they are wrong.”
-- François de La Rochefoucauld

"WE CALL BS!" -- Emma Gonzalez
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: Filliam H. Muffman
Date: July 10, 2019 06:40PM
Poor battery charging management. It's been a problem since Li-ion batteries have been used. Sadly, Lenovo (a brand I won't recommend for other reasons) has the best management I have seen. They have an option to let batteries float between 55%-80% charge if you use it as your main desktop and don't frequently use it for long sessions away from an outlet.



In tha 360. MRF User Map
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: C(-)ris
Date: July 10, 2019 06:45PM
Apple used to be at 300 charge cycles. Not sure what year they changed to 1000. Either way. I've seen plenty that hit over 1000 cycles with no issues. Typically in schools. I don't think most home users take them off the charger enough and that hurts battery life.



C(-)ris
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: hal
Date: July 10, 2019 07:36PM
Quote
C(-)ris
Apple used to be at 300 charge cycles. Not sure what year they changed to 1000. Either way. I've seen plenty that hit over 1000 cycles with no issues. Typically in schools. I don't think most home users take them off the charger enough and that hurts battery life.

300 was for the removable batteries
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: Racer X
Date: July 10, 2019 08:08PM
and if you used a laptop plugged in all the time, you could just pop out the battery, and reinsert when you go on the move.
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: Acer
Date: July 10, 2019 08:25PM
Quote
Racer X
and if you used a laptop plugged in all the time, you could just pop out the battery, and reinsert when you go on the move.

My Magsafe fell out while reading this comment.
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: Racer X
Date: July 10, 2019 10:13PM
nothing to be ashamed of. thats between you and your partner.
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: mrlynn
Date: July 11, 2019 06:38AM
So I should not leave my infrequently-used laptops (MBA, MBP) on the chargers? If asleep? If shut down? I always assumed leaving them plugged in was a good idea.

/Mr Lynn



"Hillbilly at Harvard"
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Founded in 1948 by Pappy Ben Minnich
Saturdays 9am - 1pm Eastern
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Streaming at [www.WHRB.org]
Be there!

The HAH weblog: [hillbillyatharvard.wordpress.com]

Topical weblog: [walkingcreekworld.wordpress.com]

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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: mikebw
Date: July 11, 2019 09:35AM
Quote
mrlynn
So I should not leave my infrequently-used laptops (MBA, MBP) on the chargers? If asleep? If shut down? I always assumed leaving them plugged in was a good idea.

/Mr Lynn

Me too. I have been using my 2015 MBP since new, plugged in nearly 90% of the time. But I guess if you never use the battery then you will never know that it is not good anymore.
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Re: Where did "expected lifetime of 1000 cycles" for MBP batteries come from - because I call BS!
Posted by: roshi
Date: July 11, 2019 02:01PM
Quote
OWC Larry
I would concur - laptops utilized as desktops with infrequent travel see battery longevity in the tank. On used laptops from students - we do see high battery cycles on healthy batteries cause being used as a laptop.

Larry, could you clarify these sentences a bit?

thanks, Lorin
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