Sometimes, with plenty of battery left (today it was 33%) my 2015 MBP Retina will go to sleep for no reason.
When I try to turn it back on I get the graphic that shows the battery is drained.
However, upon plugging in power cable it fire back up to show that there's plenty of battery.
I wasn't overburdening the processor(s) as I opened the laptop in the morning after it was asleep for the night.
Is this a PRAM issue?