Use hard drive as external hard drive?

Can I take the Hdd out of an old laptop and use it as an external hard drive for my PS4?

With appropriate formatting and connection cables, this is possible

That's fine

2.5 inch hard drive housing available online or Saturn, Media Markt, Conrad etc.

I don't know how this comment should help him? It's about the external connection, not the internal one

But does this hard drive housing have to be supplied with power, i.e. Have a suitable power supply?