Randomly and suddenly shutdown of MacBook Pro Retina 2015
Please what can I do?, My laptop randomly and suddenly shuts down, it’s now a regular issue, it’d shut down around 80% battery. Please if you know what the issue is, respond.
"Resetting the system management controller (SMC) can resolve certain issues related to power, battery, fans, and other features."
Please see How to reset the SMC of your Mac - Apple Support.
You also perform Apple Diagnostics Test:
How to use Apple Diagnostics on your Mac - Apple Support
Hope it helps.