BLACK+DECKER STC1820 Review
A light 18V PowerConnect grass trimmer with a 28 cm cut, flip-to-edge head and automatic line feed — for small lawns and edges, not woody growth.
In short:The BLACK+DECKER STC1820 (UK code STC1820PC-GB) is an 18V PowerConnect cordless grass trimmer weighing about 2.6 kg, with a 28 cm cut, a listed 5,500 rpm, E-Drive gearing, a power-select switch, automatic line feed (AFS) and a flip-to-edge head with a guide wheel. The UK listing includes the battery and charger. It suits small-to-medium lawns and edging; it is line-only, so no brambles or woody growth.
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Pros
- Light, at about 2.6 kg, with a telescopic shaft and adjustable second handle
- Flip-to-edge head with a guide wheel for clean lawn edges
- Automatic line feed, so no bumping the head
- Power-select switch to stretch runtime on light work
- PowerConnect battery fits other BLACK+DECKER 18V tools
Cons
- Line only, no metal blade option, so it cannot tackle brush or saplings
- 28 cm cut is modest next to the 30 cm STC1840EPC
- BLACK+DECKER doesn't put a runtime figure on the UK listing
- Battery size in the kit isn't stated on the listing
What the listing confirms
The UK version of this trimmer is sold as the STC1820PC-GB. Its Amazon.co.uk listing gives a 28 cm cutting swath, a listed 5,500 rpm, a weight of about 2.6 kg, BLACK+DECKER’s E-Drive gearing, a power-select switch, an automatic feed spool (AFS), a telescopic shaft with an adjustable second handle, and a flip-to-edge head with a precision guide wheel. The kit on that listing includes the 18V battery and charger; the listing doesn’t state the battery’s capacity.
What it is good at
The STC1820 is built for one job: keeping a small garden’s edges and awkward corners tidy without the noise, fumes or maintenance of a petrol trimmer. There’s no choke, no pull cord and no fuel mixing — squeeze the trigger and go. At about 2.6 kg it’s comfortable to hold up along a fence line or path, which is exactly what casual users want from a trimmer they use for twenty minutes every couple of weeks.
Edging is where it earns its place: flip the head and the guide wheel runs along the lawn edge so the line cuts a clean vertical line. The automatic line feed means you don’t stop to bump the head.
Being part of BLACK+DECKER’s 18V PowerConnect system is a real plus if you already own, or plan to buy, other PowerConnect garden tools: one battery can run a hedge trimmer, a blower and this trimmer.
Where it falls short
This is a line-only trimmer with no blade attachment. If your garden has bramble, woody stems or thick weedy patches, this machine isn’t designed for that job. It’s a grass-and-edge tool, not a light brush cutter — the difference is explained in brush cutter vs strimmer.
The 28 cm cut and an unstated battery capacity also make it a small-garden tool. On a larger lawn you’ll want a second battery or a bigger kit.
Who should buy it
A homeowner with a small-to-medium, mostly grass garden who wants an easy, quiet, low-maintenance way to finish edges the mower can’t reach. It’s a sensible entry point into cordless trimming, especially for anyone already invested in PowerConnect tools. For rough ground or woody growth, a blade-capable cordless model or a petrol brush cutter will do a better job — see the best brush cutters for brambles.
A simple, light, easy-to-use entry-level cordless trimmer for small tidy lawns, with genuinely good edging — but its line-only head limits it to grass.
BLACK+DECKER STC1820 — frequently asked questions
Can the STC1820 take a metal blade for brambles or thick weeds?
No. It is a line-only trimmer with no blade attachment, so it is not suited to brambles, woody stems or dense scrub. For that you need a machine rated for a blade — see the best cordless brush cutters.
Does it come with a battery and charger?
The UK version, STC1820PC-GB, is listed on Amazon.co.uk with an 18V lithium-ion battery and charger included. Other variants and some retailers sell the trimmer bare, so check the product code and what's in the box before you buy.
Is it powerful enough for a larger garden?
It's best on small-to-medium lawns and edging. The power-select switch lets you reduce output to stretch runtime on lighter grass, but on a big plot a spare PowerConnect battery, or the 30 cm STC1840EPC kit with a 4.0 Ah battery, makes more sense.
Our score
7.2/ 10
A simple, light, easy-to-use entry-level cordless trimmer for small tidy lawns, with genuinely good edging — but its line-only head limits it to grass.
Who this one is for
Small to medium lawns and light edging for homeowners who want a simple, no-fuss cordless trimmer
Guides that feature it
Price and availability
Details checked on October 26, 2026.
Sources
Specifications: manufacturer sheet and Amazon product page. Prices and availability: Keepa. No product on this site has been physically tested.
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