Hi everybody! I've mainly stuck with Core 2 Duo MacBook Pros and Hackintoshes but about a month ago I decided to splurge and snagged a mid-2012 13" MBP on eBay. It had no battery so I installed the one from my dead mid-2010 13" MBP. My mid-2010 has been dead since November of 2020 and as such the battery had been unused until I got this mid-2012, so my memory of the battery life on my mid-2010 may be off a little bit. That battery was an iFixit one that had been manufactured at the end of 2018 and had 54 cycles at the time I purchased my mid-2010. It had 82 by the time it was installed in my mid-2012 13". CoconutBattery put the health at 96% at the time of install in my mid-2012. The first thing I noticed was how the battery life was dramatically lower than my mid-2010. What I know for certain is this: my mid-2010 was able to last at least for 7 hours of web browsing on macOS Catalina. My mid-2012 got about 5 hours doing the same thing at the start of January. A couple weeks later I'd noticed that battery life seemed to be even worse and that it was dying in about 3 hours. At that point I decided to check the health and was very surprised to see that in about 30 days it had dropped by 14% in health. Today I saw that it was at 50% just an hour into the school day, and I know this battery well enough to say that 50% is really 30% on this machine since it always jumps from 19% to 2% in an instant. I checked the health and saw that it was at 78%. Two days ago it was 82%. What on earth is going on? This battery isn't super old, it has a fairly low cycle count (97), hasn't been under harsh conditions, and I always followed the instructions for battery longevity when it was in my mid-2010 on High Sierra.
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Relatively new iFixit battery in mid-2012 13" MBP dropping 2% per day
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Didn't read the entire wall of text. But iFixit batteries aren't known for quality. They're often B-grade or essentially rejected batteries.
That sounds like a bad battery. If you have a warranty on that iFixit battery, contact them. If not, you'll probably have to pay to replace it.
That's a shame. It dropped another 5% health in the last few hours. It's now sitting at 73% health. I got the battery in a mid-2010 13" MBP that I bought from someone 2 years ago for $50, so there's no warranty of any kind. Besides, it was a great deal. It had a fairly new battery, 16GB of RAM, and a new SSD, all for $50. Each of those items alone was close to $50 at that time, so to have them all together with a computer for $50 was great. I'll just switch back to my Core 2 Duo machines, their batteries are fine for me. It took a bit over a year to save up the $108 necessary to buy my 2012 MBP so I won't be able to snag myself another battery for about a year.
"2% per day"... doesn't sound all that bad to me, particularly for a replacement battery.
Replacement batteries are seldom "as good as" the factory-originals.
An exception might be Apple-labeled batteries installed at the Apple Store.
3rd party replacement batteries are really "a crapshoot".
Kinda like what Forrest Gump said about a box of chocolates:
"You just never know what you're going to get"...
Replacement batteries are seldom "as good as" the factory-originals.
An exception might be Apple-labeled batteries installed at the Apple Store.
3rd party replacement batteries are really "a crapshoot".
Kinda like what Forrest Gump said about a box of chocolates:
"You just never know what you're going to get"...
I had same experiences with Amazon (3rd party) and Ebay used original Apple batteries, end up returning all of them, finally had great success with Newer Tech battery from OWC, purchased 3yrs ago and still holding up 97% capacity till today, running well with MacOS Monterey.
eshop.macsales.com
Batteries for MacBook Pro 13" 2009 - Current Non-Retina Models
NewerTech NuPower 74 Watt-Hour Replacement Battery for all Apple MacBook Pro 13.3-inch 2009-Current non-Retina Models models. 1 Year Limited Warranty.
Purchased a new replacement battery for my MacBook Pro Mid 2012, the brand name is "simplo" as detected on coconut batteries , Now during just the calibration process, the battery health has deteorated to 91% on just 4 charge cycles, of which 2 charge cycles were indicated as soon as I installed the battery and checked the status on coconut app.
on googling I read on "Reddit" that "simplo" is OEM battery brand as discussed below :-link
now I am really confused as its health is deteriorating drastically, if its "OEM" it should perform as good as the original, before this I had the factory one "Dynaopack" named battery on my machine, which had 1765 cycles still put up 45 % battery health and around 1.5 hrs of battery life, though it had puffed out and would have damaged the trackpad so replacement was necessary.
I had the similar draining issue before so had replaced the battery with the seller, now the replacement too seams to suffer from the same quick drain issue.
what should I do? I am really confused right now !
on googling I read on "Reddit" that "simplo" is OEM battery brand as discussed below :-link
now I am really confused as its health is deteriorating drastically, if its "OEM" it should perform as good as the original, before this I had the factory one "Dynaopack" named battery on my machine, which had 1765 cycles still put up 45 % battery health and around 1.5 hrs of battery life, though it had puffed out and would have damaged the trackpad so replacement was necessary.
I had the similar draining issue before so had replaced the battery with the seller, now the replacement too seams to suffer from the same quick drain issue.
what should I do? I am really confused right now !
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I got an iFixit battery for my "Late 2013" 15" Retina MacBook Pro.
It said 9160 mAh capacity out of 8600 (107%) with 0 charge cycles. That looked GREAT. After 5 charge cycles, it was then completely dead. The system wouldn't power on unless plugged in. macOS said no battery was even installed. I disconnected and reconnected it and reset SMC, but it still didn't see it.
I contacted iFixit and they sent me another one. The battery design looked slightly different. Locations of battery info and fonts were printed differently. It looked like it was from a different manufacturer. It also says 9160 mAh out of 8600 (107%). I've been doing 100% to 0% to 100% cycles trying to get it to fail, or at least give me a more accurate number. It won't budge from its 107% capacity claim, even after 11 full charge cycles. This battery certainly works better than the previous one, but I wish I could get a more accurate reading other than something "stuck" at 9160 mAh. I'm trying to fix this system up for someone else to use, and I want to make sure they have a stable battery. Inaccurate charge information could lead to the system powering off instead of sleeping when low.
It said 9160 mAh capacity out of 8600 (107%) with 0 charge cycles. That looked GREAT. After 5 charge cycles, it was then completely dead. The system wouldn't power on unless plugged in. macOS said no battery was even installed. I disconnected and reconnected it and reset SMC, but it still didn't see it.
I contacted iFixit and they sent me another one. The battery design looked slightly different. Locations of battery info and fonts were printed differently. It looked like it was from a different manufacturer. It also says 9160 mAh out of 8600 (107%). I've been doing 100% to 0% to 100% cycles trying to get it to fail, or at least give me a more accurate number. It won't budge from its 107% capacity claim, even after 11 full charge cycles. This battery certainly works better than the previous one, but I wish I could get a more accurate reading other than something "stuck" at 9160 mAh. I'm trying to fix this system up for someone else to use, and I want to make sure they have a stable battery. Inaccurate charge information could lead to the system powering off instead of sleeping when low.
Seems like that battery is about 4 years old and has been at 0% for a quite a while. The problem is chemicals inside degrades overtime and having it sit at 0% is one of the worst thing you can do to the battery regardless of what coconut battery says.