How is your rMBP battery doing?

ghanwani

macrumors 65816
Original poster
Dec 8, 2008
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2017 rMBP nTB here.
Coconut Battery is reporting 83% of design capacity after 354 cycles.
Apple designs for 80% after 1000 cycles.
Can I trust the Coconut Battery number?
What is current wisdom on maximizing battery life with these machines?
How's your battery doing?

Edit: My typical usage is to charge overnight and use during the day. Currently, it's not really able to make it through the day without needing additional charging at some point during the day. Brightness is set to 75% and NOT dim when on battery use.
 

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Airboy1466

macrumors 6502
Feb 23, 2015
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Apple can only predict with the type of set usage that they intend everyone to use, but as humans we have our own behaviors such as always leaving it plugged in etc the actual age of the battery and not just the cycle it self. Me telling you my battery capacity and it’s usage are fairly irrelevant and wouldn’t help you to dictate if your battery is faulty.
You seem to be an extreme user having 350 cycles in such a short time vs me only having 150 cycles on my original battery in 3 years and battery still holding 98% charge. It seems to me you are overworking your battery and are allowing it to get hot causing it to deteriorate more quickly.
 

ghanwani

macrumors 65816
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Dec 8, 2008
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I edited my original post with typical usage.

What causes the battery to be overworked and hot?
 

Airboy1466

macrumors 6502
Feb 23, 2015
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I edited my original post with typical usage.

What causes the battery to be overworked and hot?
you could be charging it on carpet or a bed which isn't good for heat disbursement. charging it while performing a heavy workload there are so many factors charging and using while brightness is high.
 

smirking

macrumors 68020
Aug 31, 2003
2,175
1,585
Silicon Valley
How's your battery doing?
I have a 2016 tbMBP. Coconut Battery currently fluctuates between 81% and 83% and I've used up 255 cycles. I never get anywhere close to what Apple says I should get, but I'm a developer and the things I do are brutal for battery life. My MBP gets pushed very hard almost every day and I rarely get more than 4 hours out of it and this was true even at 100%.

I've heard that Apple rates their batterys to be at or above 80% after a certain number of cycles. Is it 1000? That sounds a bit high to me. I thought it was a lot lower. Does anyone know what Apple's policy on replacing batteries that drop below 80% before it hits 1000 cycles? My AppleCare is still good for another year.
 

ghanwani

macrumors 65816
Original poster
Dec 8, 2008
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I've heard that Apple rates their batterys to be at or above 80% after a certain number of cycles. Is it 1000? That sounds a bit high to me. I thought it was a lot lower. Does anyone know what Apple's policy on replacing batteries that drop below 80% before it hits 1000 cycles? My AppleCare is still good for another year.
https://www.apple.com/batteries/service-and-recycling/
They will replace it if you have AppleCare.

[doublepost=1542954596][/doublepost]
you could be charging it on carpet
I do this sometimes, but none of the other things you mentioned.
 

Airboy1466

macrumors 6502
Feb 23, 2015
326
29
I have a 2016 tbMBP. Coconut Battery currently fluctuates between 81% and 83% and I've used up 255 cycles. I never get anywhere close to what Apple says I should get, but I'm a developer and the things I do are brutal for battery life. My MBP gets pushed very hard almost every day and I rarely get more than 4 hours out of it and this was true even at 100%.

I've heard that Apple rates their batterys to be at or above 80% after a certain number of cycles. Is it 1000? That sounds a bit high to me. I thought it was a lot lower. Does anyone know what Apple's policy on replacing batteries that drop below 80% before it hits 1000 cycles? My AppleCare is still good for another year.
With apple care you can get it replaced whenever however many times it will just be consider a repeat repair under the policy and it is quoted at 1000 cycles
 

smirking

macrumors 68020
Aug 31, 2003
2,175
1,585
Silicon Valley
Hmmm... they specifically cite that they might replace it if you have AppleCare+. I only have regular AppleCare, but regular AppleCare was getting phased out when I got it so hopefully this doesn't exclude people who didn't get one of the new fangled plus plans.

I'm probably going to have to find out the hard way. My battery is probably going to start declining faster as it gets lower in capacity. I've got another year before I've got to attempt an AppleCare claim.
 

ghanwani

macrumors 65816
Original poster
Dec 8, 2008
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Hmmm... they specifically cite that they might replace it if you have AppleCare+. I only have regular AppleCare, but regular AppleCare was getting phased out when I got it so hopefully this doesn't exclude people who didn't get one of the new fangled plus plans.
I had a 2010 MBP and the battery was replace near the end of the 3-year AppleCare period. I took it in for a problem with the superdrive and along with that they replaced the battery because it tested at below 80%.

I have regular AppleCare too. I got it near the end 1-year of ownership in May 2018. I got it mainly because I noticed deterioration in the battery. I figured I would at least get a battery out of it.

AFAIK, the differences between AppleCare and AppleCare+ are:
- AC can be bought anytime till warranty expires, AC+ must be bought within 60 days.
- In addition to everything AC covers, AC+ also covers accidental damage.

This is from my AC contract and it specifically mentions the battery:
3. What is Covered?
3.1 Hardware Service
If during the Coverage Period, you submit a valid claim by notifying Apple that (i) a defect in
materials and workmanship has arisen in the Covered Equipment, or (ii) the capacity of a
covered battery to hold an electrical charge is less than eighty percent (80%) of its original
specifications, Apple will either (a) repair the defect at no charge, using new or refurbished parts
that are equivalent to new in performance and reliability, or (b) exchange the Covered
Equipment with a replacement product that is new or equivalent to new in performance and
reliability, and is at least functionally equivalent to the original product. If Apple exchanges the
Covered Equipment, the original product becomes Apple’s property and the replacement
product is your property with coverage for the remaining period of the Plan.
 
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