Does the kit include a charger?

Yes. The kit comes with a charger for the 24V lithium-ion battery, along with the four tools and a contractor bag.

How many batteries come with it?

One 24V lithium-ion battery. That means you can only run one tool at a time and must recharge before switching to another.

Is this kit good for a professional contractor?

For light remodeling and punch-list work, yes. For all-day production work, the single battery and the saw's slower cutting make it a backup rather than a primary kit.

Do the batteries fit other Kobalt 24V tools?

Yes. The 24V Max battery works across the Kobalt 24V line, so you can add bare tools later without buying new batteries.

What is the fourth tool in the kit?

The listing names a reciprocating saw, a 1/2-in drill/driver and a 1/4-in impact driver; check the box contents for the fourth tool before buying, since kits vary.

How does it compare with an 18V kit from a major brand?

Power is comparable thanks to brushless motors, but major-brand 18V kits usually include two batteries and a much wider tool selection. Choose this one if you want the Kobalt platform.