Windows batch - concatenate multiple text files into one

Question

I need to create a script, which concatenates multiple text files into one. I know it\'s simple to use

type *.txt > merged.txt

But the require

Answer 1

cat "input files" > "output files"

This works in PowerShell, which is the Windows preferred shell in current Windows versions, therefore it works. It is also the only version of the answers above to work with large files, where 'type' or 'copy' fails.