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The March 2015 update of Apple's 13" MacBook Pro Retina Display, model A1502, features fifth-generation Intel Core i5 and i7 processors and introduces the Force Touch trackpad.

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MacBook Pro goes slow and high temperatures after battery removal

Hi dears.

Some years ago my macbook pro Retina early 2015 had a swollen battery and we had to withdraw it. but as i was in a sanctioned county i couldn't buy an original battery and put it instead. so i kept working with it for somw years without battery.

Now I'm in Spain and i have ordered a new battery and it's not the original one (tried to be the exact one) and i hope it will fix this problem thay i have:

As you know this machines work really laggish and slower when you extract the battery. i just don't know why is it heating up so much!!! any idea??!!

And do i need to reset the SMC and stuff after putting new battery?

in 4 days I'll be updating if the new battery helps.

Thanks.

Update (05/15/23)

It actually worked!! I just put the new battery and it's working so much faster now! But still isn't butter fluent as it was before, could it be a graphic issue?
i mean, the grafphics are not as smooth as they were, the web pages while scrooling and ...

i also have got an extence CPU load and temp, i dont have any idea why....
here there are some screen shots

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This may very well fix your issue. It's not uncommon for MacBooks to act this way in the absence of a battery. More than likely your temperatures are fine, but the MacBook is not pleased that there's no battery connected because it's expecting data from sensors in the battery that is no longer getting. The Mac will enable a protective mode because readings are outside expected norms. Fans ramp up super high and it throttles the computer to very slow to combat perceived high temperatures whether or not temperatures are actually high.

Try downloading TGPro or Macs Fan Control (there are other temp/fan monitoring apps for Mac, but these are my go tos). It will tell you what temperatures your sensors are current reading, and an idea of what's normal.

It's definitely possible installing a new battery may correct this, even a non OEM one.

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Yes! This is the correct behavior when the battery has been removed.

SMC which manages your systems cooling and monitors a sizable collection of sensors will go into CPU Safe Mode which is what you are seeing a Ramped up fan and the CPUs clocking is reduced.

Putting a fresh battery back in will solve this.

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