Problems with MacBook pro (15 inch early 2011) battery

[Golden_N]

Hi everyone. Not sure if i should post this here or somewhere else but i have a question.

I found a MacBook Pro 15 inch early 2011 in trash with a swollen battery. I removed the battery and bought a charger and run the laptop without the battery. Everything works good and so i decided to buy a battery for it. When i got the battery and installed it in the laptop it worked but when you let the battery discharge it will jump from 50%-70% to 7% and stay there for a while and the battery maximum capacity goes down. After a few cycles it is already under 60% health. I read about the issue and it seems to be faulty battery. I contacted the seller and they send me a new battery. Same issue. I gave up and after few months i contacted the seller again and got 3rd battery but it has the same issue.

And so i was wondering if all three batteries are faulty or did the swollen battery damage something inside the laptop and if yes then what did it damage and is there a fix for it.

Sorry for the bad english. Any help would be appreciated. Thanks in advance.

 

[Audit13]

Did you calibrate the replacement batteries?

 

[saudor]

On a slightly unrelated note, if that 15" has the radeon dGPU, it might not be worth messing around with it. Those have such high failure rates and you need to do a lot of tweaking around to get the laptop to work (and with compromises like lower battery life from the dGPU still sucking power, etc)

see here: https://forums.macrumors.com/thread...ntel-integrated-gpu-efi-variable-fix.2037591/

 

[Golden_N]

Thanks for the answers.

Audit13. I did caribrate them and some of them i caribrated three times. On the first try with the first battery it returnet a bid of cappacity but that was it.

Saudor. I know that they have graphic issues but it is working for now and it would be atleast ten times faster than any other laptop in my household so i would love to get it working and use it in my studies.

 

[Fishrrman]

3rd-party replacement batteries almost never work as well as the "factory originals" did.
It's a crap shoot.
Sometimes one will get lucky.
Much of the time, one has to put up with things as they are.

 

[Golden_N]

Fishrrman. Thanks for your answer. I know that 3rd-party batteries will most likely be worse but i dont think they should lose half of the cappasity in 10 cycles. I also remebered that with the second replacement battery i had problem that if i use it more than an hour. I could get small electric shock from the body. I covered the battery capartment in tape that doesn't contuct electricity and it stopped the electric shocks but didn't help with the cappacity loss.

 

[hallux]

if that 15" has the radeon dGPU

I'm fairly certain there's no "if", pretty sure all 15" MBPs of that vintage had the dGPU and they were all Radeon.

 

[satinsilverem2]

Dont forget that when you run a Mac portable with no battery installed it OS forces the CPU to run at a lower clock speed to keep from using more power than the power adapter can provide. I had to run my 2011 13" like that for a month and it was dog slow and it forced my 2.7 i7 to run at 1.4ghz.

 

[Golden_N]

Dont forget that when you run a Mac portable with no battery installed it OS forces the CPU to run at a lower clock speed to keep from using more power than the power adapter can provide. I had to run my 2011 13" like that for a month and it was dog slow and it forced my 2.7 i7 to run at 1.4ghz.

Because of that underclock i want to have a battery. And if the battery would hold a charge then it would be even better. Also i dont really need the dGpu so if it fails it isn't too bad for me.