MacBook Pro 2017 battery swells and shuts off after unplugging

Question

MacBook Pro 2017 battery swells and shuts off after unplugging

Hi, I keep on having the same problem with my MacBook Pro 2017, about a year ago I've decided to replace my battery because the old one started to swell and to be honest I was scared that it might explode, I've replaced it with a new one, for a short amount of time everything was going pretty smooth until recently, the battery started to swell again, the percentage of the battery is 100% connected by cable but when I unplug it, it automatically shuts off, the battery in setting is normal supposedly, but I need to know what exactly should I do, I don't want a new Mac, this one is actually the perfect one for me and I need to know what should I to in order to maintain it for a few more years, I've also tried the apple diagnosis and nothing came up, resetting the SMC and nothing one again. Thanks

[Re-Titled by Moderator]

Original Title: MacBook Pro 2017 Battery

MacBook Pro 13″, macOS 13.6

Posted on Sep 28, 2025 4:38 PM

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Answer 1

Top-ranking reply

D.I. Johnson

Level 8

35,381 points

Sep 28, 2025 5:06 PM in response to Uninstalling_app_problem

The only thing to do with a battery that is swelling is replace it- again. Resetting the SMC will not repair a faulty battery.

Not sure where you got the first replacement, but you might look to a different vendor or brand for the next. I suggest that you take a look at macsales.com for a battery.

To get the most from your battery:

• Let the OS and charging circuits manage the charging.

• Plug in when using the computer near available power.

• Use on battery when ac is unavailable or when you must be mobile.

• Don’t subject the computer and battery to extreme temperatures.

• Don’t allow the battery to regularly discharge deeply before plugging in. Yes, it may happen from time to time, just don't make it a habit.

• Don't obsess over battery life and/or health.

Here is Apple's guidance on the subject.

Batteries - Maximizing Performance - Apple Support

About battery health management in Mac laptops - Apple Support

If battery charging is paused or on hold on your Mac - Apple Support

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