BatchDialer with Leads or Seller Leads or Contacts?

Can I use BatchDialer instead of smrtPhone with "Leads" or just with "Seller Leads".

Can I use BatchDialer with "Contacts app (with single head icon)" or just with the other app called "Contacts (with multiple heads icon)"?

If I can use BatchDialer, how do I do it? can you provide a like with set up instructions please?