Does it come with batteries and a charger?

The W2 kit version ships with two 18V batteries and a charger. Check the kit contents before buying, since bare-tool versions leave you to supply your own packs.

How long does it run on a charge?

It draws on two 18V batteries at once, so runtime depends on their capacity and on grass height and dampness. Larger packs give longer runs; thick, wet grass shortens them.

Is the 53 cm deck good for a large lawn?

Yes. A 53 cm cut is wide for a cordless mower, so it covers a large lawn in fewer passes than a narrower deck. The trade-off is more weight to push.

Can I use my existing DeWalt 18V batteries?

Yes. It runs on DeWalt 18V packs, the same line used by the brand's drills and other tools. Two packs are needed at the same time.

How does it compare with a gas mower?

It is quieter and needs no gas or oil, and it starts at the push of a button. A gas mower still wins on sustained power in very thick grass and on refueling without waiting for a charge.