I own this and many of the C3 cordless tools. Most do not come with batteries unless there is a special with several tools, a battery and charger included. Why add the expense of batteries to every tool, if you already have them? The batteries can be purchased separately. The batteries, Craftsman C3 19.2-Volts, come in the following flavors:
Lithium-ion High Capacity
XCP Lithium-ion Compact
XCP Lithium-ion High Capacity
That is the order they came out, and the list also reflects increasing capacity and price range.
I believe my charger is listed as a multi-chemical charger, capable of charging the 19.2-volt Lithium-Ion battery or Ni-cad batteries.
I now purchase the XCP Lithium-ion batteries exclusively. They last the longest, but also cost the most.
I still have Ni-Cd that are over four years old and they still function fine, but last the less amount of time on demanding tools like the leaf blower or chainsaw. They last fine on the radio or lights.
I worked as a carpenter for several years, now I just do DYI projects including home repair and maintenance, but these tools make life easier and the job go faster... especially being "cordless". I would advise at least two batteries one to use and a spare while one is being charged. In my experience batteries are not included in the other cordless brands either.
I hope this helps.