Earlier today Apple released a battery recall press release. MacBook Pro's bought in 2015 need their battery replaced for fear of igniting when overheated.
If you're unsure your laptop is a MacBook Pro 2015, you can check your serial number (found on the underside of your laptop or in the 'About' section of you laptop) on their website. You can click here.
If you or someone you know has been affected, please do not use your laptop and find the nearest Apple store and they will issue a free battery replacement.