Using old 5W iPhone 5 Power Adapter to charge new iPhone XR?

I would like to know if it is safe to use an "old" 5W Power Adapter (charging brick) from an iPhone 5 to charge my new iPhone XR. I'm specifically referring to the original (and, of course, genuine) charging brick that my old iPhone 5 included in the box.

Yeah, I know that my new iPhone XR already includes a cable and a 5W Power Adapter… However, I would like to have two chargers (one at my work and the other one at home).

I would definitely need to purchase a new lightning cable… But, my question is… Is it necessary to purchase a new charging brick? Could the "old" charging brick damage my new phone (since it is too old)? It seems to work fine. It worked perfectly with my iPhone 5, but I'm not sure if I should use it on my iPhone XR.

I know that this question may seem stupid, but I prefer to play it safe. Thanks everyone and sorry about my English (my first language is Spanish).

Chargers are the same.

You can. They should have the same specs: 5 W, 1 A.

If you get a 5W, 2.1 A, it'll charge even faster.

If you want to supercharge it, get the 30W mac book adapter and a USB-C to lightning cable. It charges about 1% a minute on the xs max.

Yes since they are the same power adapters all those years later (much to reviewers disapproval).

Yeah your good