Macbook Pro shutting down after start up
I'm hoping somone might help me please.
I have a 15" MacBook Pro late 2013.
Recently upon start up with a fully charged battery my MacBook with shut down not long after I log in.
The screen turns off and it seems to power off.
When I press the power button an icon will appear on a black screen in red suggesting low power/ connect power cable. But I know there is a full battery.
When I plug the power cable in it will boot and work as normal. Unplugging the cable it still works as well.
It has been pretty cold here so I thought that might be an issue. Also I updated MacOS over a week ago.
I've run a scan on the disk and it seems OK.
Anything else I can try?