If you’re using a Mid-2015 15-inch MacBook Pro—Apple has started a recall program to replace batteries that could explode and catch on fire. To find out if your MacBook Pro is affected, enter its serial number into Apple’s recall page. If it is included in the recall, Apple recommends you shut it down and stop using it immediately! Contact Apple for a free battery replacement.
If you are a customer of mine with this model (and you have my diagnostic program installed), I’ve already reached out to you to let you know whether you’ve been affected.
(Image courtesy of Apple)