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Macbook Pro Battery and Slowness Issue

S

snerkler

macrumors 65816
Original poster
Feb 14, 2012
1,176
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I used my old 2017 touchbar MBP at the weekend for the first time in over 12 months and it was incredibly slow importing and processing photos in lightroom, it was also just generally sluggish booting up and using any app. Also the battery showed 44% and then just turned off. I plugged it in and turned it on and the battery still showed 44%. I performed an SMC reset and charged it up fully. It then dropped from 100% to 33% in minutes and then turned off. When I plugged it in and turned it back on it showed 40% charge.

Does anyone know what's up with the battery and why it's become sluggish? Is it just becasue it's been left unused for a long time and will come 'back to life' with more use?
 
Those Mac’s can use more power than the charger can supply when maximum performance is requested.
When the battery can not supply the part the charger can’t deliver it slows down to a slower speed requiring less power which the charger can deliver. In this way the machine keeps functioning, although somewhat slower.
 
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SjoukeW said:
Those Mac’s can use more power than the charger can supply when maximum performance is requested.
When the battery can not supply the part the charger can’t deliver it slows down to a slower speed requiring less power which the charger can deliver. In this way the machine keeps functioning, although somewhat slower.
Click to expand...
Sorry I should have said this was using battery, not plugged into the mains. I appreciate that certain apps can slow the computer down, but I used to use it all the time before it got replaced by my curent MBP and it was much faster back then, plus it never drained the battery in under 5 mins and didn't turn off whilst showing 30+ or 40+% battery 🤷🏻‍♂️
 
The battery is shot -- gone bad.

Probably to be expected with age -- or more likely from lack of regular use (involving charge/discharge cycles).

Either replace the battery, or replace the computer.
It's really that simple...
 
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Audit13 said:
You can install Coconut Battery to check the battery health.

The battery may need replacement.

coconutBattery 4 - by coconut-flavour.com

With coconutBattery you are always aware of your current battery health. It shows you live information about the battery in your Mac and iOS devices (iPhone, iPad)
coconut-flavour.com
Click to expand...

Fishrrman said:
The battery is shot -- gone bad.

Probably to be expected with age -- or more likely from lack of regular use (involving charge/discharge cycles).

Either replace the battery, or replace the computer.
It's really that simple...
Click to expand...
The battery is showing as being fine. Mac's own battery health in the settings says the battery is normal, and a battery health check from the App Store says the battery's health is 77%.

Is there anything else that could be causing the issue?
 
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