Flex-Force is the reason to buy this saw: a 60V pack shared with Toro's mowers, snow blowers, trimmers and blowers, which is a far deeper platform than Skil's PWRCore 40 or B+D's 40V MAX. The saw itself is a brushless 16-incher with a 0.375-inch, .043-gauge chain and 3-year coverage on both tool and battery — the only entry in this group whose battery warranty matches its tool. Two things count against it. The 2.5Ah pack in the kit is small for 60 volts and a 16-inch bar, so the saw outruns its battery; Toro sells 4.0Ah and larger packs separately and most owners end up there. And Toro's published 18.5 lb is the highest figure of any 16-inch battery saw here, with no statement of what it includes, which makes it impossible to compare honestly against Skil's 8.99 lb bare 18-incher. A tool-only 51850T exists for Flex-Force owners, and that is the version that makes the most sense.

Best for: Owners already running Toro Flex-Force mowers or snow blowers who want a 16-inch saw on the same battery.

Specifications

Engine class: 40cc class (placed by shipped bar length)
Voltage: 60 V
Kit battery: 2.5 Ah
Bar length: 16 in
Bar range: 16 in
Single-pass cut: about 14 in (bar minus 2)
Chain: 0.375" pitch / .043" gauge
Weight: 18.5 lb, Toro's published figure; Toro does not state whether the battery is included
Power type: Battery
Use case: Homeowner
Warranty: 3-year tool, 3-year battery
Model: 51850

Manufacturer figures except the engine class and single-pass cut, which are derived here. What each spec means

Flex-Force pack runs Toro mowers
3-year tool and battery
Tool-only 51850T available

Where it is strong

60V Flex-Force packs cross to Toro mowers, snow blowers, trimmers and blowers
3-year battery warranty matches the tool — unique in this group
Brushless motor on a genuine 60V platform, not two 20V packs in series
Tool-only 51850T lets Flex-Force owners skip a redundant battery
Sold through Lowe's, Ace and Tractor Supply, so service and stock are easy to find

Where it falls short

The kit's 2.5Ah pack is small for a 16-inch 60V saw; a bigger pack is close to a required upgrade
Toro's published 18.5 lb is the highest of any 16-inch battery saw here, and the basis is unstated
$300 is the highest kit price of any 16-inch battery saw from a value brand here
.043-gauge narrow-kerf chain despite the 60V motor
No bar-length options — Toro's 60V handheld line is 16 inches only

Written from the spec sheet and the maker's documentation; owner reports for this model were too thin to summarize.