MacBook Pro shows false empty battery

[PeterLC]

I have a MacBook Pro, model 10,1. running High Sierra 10.13.4. Since Sierra this computer has often, but not every time, been failing to start - showing me the empty battery. When I then plug it in, a few seconds go by and it starts up and displaying anywhere from 25% to 65% battery. Why is the computer failing to start when unplugged, when it has ample battery life to work with?

Thanks in advance. Peter

 

[jerryk]

What is the battery condition? https://support.apple.com/en-us/HT201585

Since it 6 year old, you might just want to take it in and have someone check the battery and charging system out.

 

[JPack]

it starts up and displaying anywhere from 25% to 65% battery.

This is a strong indication your battery needs service.

As the battery ages, the battery impedance increases and is unable to provide the "peak power" needed to start up a computer. The battery gauge loses calibration as this happens.

 

[Fishrrman]

Use Coconut Battery (free download) to check the battery.
Post a screenshot of your results here.