Over 60 cuts through 4x4 pine on one 2.0Ah charge is the only performance figure B+D publishes for the LCS1240, and it is a fair one to judge it by: this is a saw sized for dimensional lumber and fallen limbs, not for bucking. It runs the same 12-inch, 45-drive-link, .043-gauge bar and chain as the DeWalt DCCS620 and Craftsman CMCCS620 — the three are chain-interchangeable, which makes loops easy to source despite the narrow gauge. The catch is the platform. B+D's 40V MAX line has shrunk to a handful of tools, so unlike the 20V packs this battery has almost nothing else to power, and at $199 you are paying battery-plus-saw for a platform with no second act. The 11.1 lb listed weight is also heavy against 12-inch brushless rivals.

Best for: Someone who wants one simple battery saw for limbs and lumber and will not buy other cordless yard tools.

Specifications

Engine class: 30cc class (placed by shipped bar length)
Voltage: 40 V
Kit battery: 2 Ah
Bar length: 12 in
Bar range: 12 in
Single-pass cut: about 10 in (bar minus 2)
Chain: 3/8" low-profile pitch / .043" gauge, 45 DL (Oregon R45 equivalent)
Weight: 11.1 lb, manufacturer-listed weight; B+D does not state whether the battery is included
Power type: Battery
Use case: Homeowner
Warranty: 2-year limited
Model: LCS1240

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

60+ 4x4 pine cuts per charge
Shares chains with DCCS620
Dead-end 40V platform

Where it is strong

Chain and bar interchange with DeWalt DCCS620 and Craftsman CMCCS620, so loops are everywhere
60-plus 4x4 cuts per charge is a published, checkable figure — rare in this price class
Automatic bar-and-chain oiling and tool-free tensioning
40V gives it noticeably more bite than B+D's 20V 10-inch saw
Complete kit at $199 with no separate battery purchase

Where it falls short

B+D's 40V MAX line has few other tools, so the pack is close to single-purpose
11.1 lb listed is heavy for a 12-inch bar; several brushless 14-inch saws weigh less
Brushed motor and a single 2.0Ah pack cap sustained cutting
No tool-only SKU sold on B+D's own site, so owners cannot buy just the saw
B+D does not state whether the listed weight includes the battery

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