The Dewalt DCS391 is a 18V cordless circular saw which works on the XR 18v Dewalt platform. This saw is very powerful and cuts timber and nail embedded timber with ease. I bought this from eBay for about £139 naked (with no batteries or charger). https://fave.co/2R8PfiZ
The saw is great, apart from the dust extraction port, which seems to be totally in the way.