When choosing cordless circular saws, purchase higher voltage options (18V or 24V) for heavy duty cutting. Anything less than an 18v saw will find it difficult to cut through 2x lumber. The best batteries for a portable circular saw are Lithium Ion batteries. It is best to choose between a 6 1/2” blade as the larger the blade, the quicker the job will be done and the easier it will be to keep your cuts on track. Look for ones with adjustable and blade depth with soft and easy to grip handles which will increase comfort level during work. Select saws with a sturdy body for safety and ones which include blade and trigger locks.
There are a wide range of manufacturers of cordless circular saws offering a variety of models in the extensive price range of around $36 to $500, reflecting the level of quality and features offered. There is, however, a broad spectrum of prices for the same model so be careful when purchasing, The following cordless circular saws are some of the newest and most highly recommended saws and can serve as a circular saw guide when you are researching.
The best cordless circular saw presently on the market for both power and endurance is the 28V Milwaukee 6 1/2” cordless circular saw 0730-22. It is $399.99 as a kit with batteries, blade and charger or as a bare tool for $342. Weighing around 20 lbs, it has a high-strength aluminium soleplate and tactile grips on both handles. At 4200 rpm it has exceptional cutting power though it tends to be noisy and to use it all day on a construction job will require multiple battery recharges.
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As a manufacturer of leading-edge power tools, a Makita cordless circular saw is an excellent buy. The BSS610 18V LXT Lithium Ion 6 1/2” saw features a Makita-built high-torque motor that produces 3700 rpm for fast cutting. Weighing 7.1 lbs and measuring only 13 5/8” its compact, ergonomic and balanced design is extremely light and easy to work with. Two built-in LED lights illuminate the cutting path and a dust-blower keeps the line cut clean. It can be purchased as a kit with batteries, blade and charger for $330.88 or as a bare tool for $139.99.
For a cheaper option but a very good product, the Hitachi cordless circular saw C18DLP4 costs $99. It features a left-mounted 6 1/2” blade and weighs 9 lbs. A built-in spotlight delivers improved visibility of cut-line and a fan-cooled motor extends running time. It is light and handy and has a soft elastomer grip for improved comfort.
Many craftsmen have a range of cordless Dewalt home improvement tools and to add to this collection the 18V Dewalt cordless circular saw DC390B costs $89.99. It uses a 6 1/2” blade and is capable of 3700 rpm and weighs around 9 lbs. In a similar price range the Black and Decker Firestorm 18V cordless circular saw FS18CS has been hailed as innovative and cost-effective.
Ridgid and Ryobi cordless circular saws tend to be entry-level cordless tools and are geared for light-duty use, being less powerful. The general finish is economical and, of course, these saws are much cheaper. The Ridgid R845 cordless circular saw costs $59 and the Ryobi cordless circular saw ZRP500 costs only $36.