Best Black and Decker Cordless String Trimmers (2026)

This is the Black+Decker string trimmer that suits the most yards. A 13 inch cutting swath is wide enough to cover a lawn border quickly, and a power drive transmission raises torque at the string so the head holds speed when it meets thick, wet grass. The 40V MAX battery has a state-of-charge indicator, which tells you at a glance whether you can finish the front edge.

The tool converts from trimmer to edger in seconds, which matters more than it sounds: edging a driveway with the head turned and a wheel guide is the job where small string trimmers earn their keep. The kit includes a battery and charger, so there is nothing to add.

The tradeoff is weight and reach against the 20V models: a 40V battery is bigger, and the shaft is fixed length, so a tall user has to bend more than with the telescoping sibling. Replace the line with the maker's spools, clean grass from under the guard after each use and store the battery indoors. For a mid-sized lawn, it is the one to buy first. The charge indicator also helps you plan the order of the job, so you can edge the long driveway first and trim the small beds with whatever remains. Over several seasons it is the pack that ages first, so avoid leaving it on the charger over winter.

The telescoping pole is the difference here. An adjustable shaft lets a tall user set the head so they do not stoop, and lets a short user shorten it for control, which is a bigger comfort gain than any spec on the box. It also gives a PowerCommand dial that chooses between maximum power for thick weeds and maximum runtime for long edges.

The dial is useful because a single battery has to cover very different jobs. On the runtime setting you can trim a long fence line without a recharge, and on the power setting the transmission pushes harder through tall grass at a cost to the run. It is a real advantage over the fixed-speed 20V models.

The pole has a clamp that can loosen with use, so check it before each session, and clean the shaft joint of grit. The 13 inch swath and 40V battery match the main kit above. If you are over six feet or under five and a half, the adjustability is worth having. A household with two users of different heights gets the most from it, because each person can set the shaft in ten seconds and avoid wrist strain. Keep a note of the clamp setting that suits each person so the head does not slip.

This is the bare-tool version for people who already own 40V MAX batteries. It adds a longer, far-reach shaft, so you can trim under hedges and fences without a deep stoop, and the same power adjustment dial as the telescoping model chooses between strength and runtime.

The enhanced transmission boosts motor output at the cutting string, which is how the brand gets a modest motor to cut thick growth. It is a good fit for a household that already has the batteries from a mower or sweeper, because the saving of a bare tool is then real.

The tradeoff is clear: no battery and no charger in the box, so a first-time buyer pays more than for the kit. Keep the guard clean, replace the line before it shortens below the guard edge and store the battery indoors. If you do not own 40V batteries, buy the kit instead. Because the shaft is longer than the standard model, balance shifts slightly toward the head, so try holding it with your lead hand closer to the motor. Used that way, it is comfortable for trimming under low rails and along fence bottoms.

EASYFEED is the feature that sets this model apart. A push button advances the line, so there is no bumping the head on the ground and no tool-fighting when the string runs short, and it removes the most common annoyance of a string trimmer. The 12 inch swath is a little narrower than the 40V models and the two speeds let you boost power or stretch runtime.

PowerDrive transmission increases torque at the string, so this small 20V machine cuts better than its battery size suggests. It is light and easy to handle, and for a small to medium lawn it is the most comfortable tool in the lineup.

As always with small batteries, runtime is the limit: expect a short session on high speed and plan to swap or recharge on a larger lawn. Clear grass from under the guard after each use and keep the battery away from cold sheds. The 12 inch swath is a little narrower than the 40V tools, but on a small lawn the difference in time is a minute or two. Many owners value the lighter feel more than the extra width, especially for edging beds one-handed.

This kit is two tools on one platform: a string trimmer that converts to a wheeled edger, and a sweeper to clear clippings from paths. It ships with two batteries and a charger, so one can charge while you use the other, and an automatic line feed system supplies line as needed.

The combination is where it earns its place. After edging a driveway, a sweeper clears the debris in minutes without hauling out a blower, and the shared battery makes it cheaper than buying the tools separately. The trimmer itself is a lightweight, quiet design for small yards.

The tradeoff is power: a 20V system is for ordinary weeds and lawn edges, not brush. Wipe the head after each session, keep the batteries indoors and replace the line before it gets short. If you have a small yard with hard surfaces, this is the practical choice. With two batteries you can rotate them so one is always ready, and the shared platform means a future purchase such as a hedge trimmer needs no new charger. Keep the sweeper nozzle clear of grass clippings so it does not lose air speed.

The LCC340C pairs the LST140 trimmer with the LSW40 sweeper, both on 40V MAX. The trimmer has a power drive transmission and automatic feed spool, and the sweeper moves air at up to 130 mph, which is enough to clear light debris from hard surfaces.

Compared with the 20V combo it has more battery energy and a stronger trimmer, but only one battery in the kit. That means one session at a time, and a recharge before you start the sweeper if the trimmer drained the pack. The price tier is the highest in the lineup because it includes two tools.

It makes sense if you already own 40V tools or plan to build a set around the platform. Clean the spool housing, store the battery indoors and check the sweeper intake for clogs. Otherwise the 13 inch 40V kit above is the simpler choice. If you buy this one, consider a spare battery from the start, because a single pack serving two tools is its real weak point. A spare also lets you edge and sweep in one visit without waiting for a recharge.