BLACK+DECKER 20V MAX 2 in 1 String Trimmer and Edger (LST300) Review
A cordless 2 in 1 trimmer and edger with automatic feed spool and included 2.0Ah battery.
| Brand | BLACK+DECKER |
|---|---|
| Category | String Trimmers |
| Power Source | 20V MAX lithium ion battery |
| Battery Capacity | 2.0 Amp hour |
| Cutting Swath | 12 inches |
| Motor Speed | 6200 RPM |
| Best for | Small to medium yards needing cordless trimming and edging |
Product Overview
The BLACK+DECKER 20V MAX String Trimmer and Edger is a cordless 2 in 1 weed wacker with a 12 inch steel deck, automatic feed spool, and included 2.0Ah battery and wall mountable charging base.
This review checks the listing specs against typical cordless trimmer needs, focusing on power, feed system, comfort, and what the included battery does and does not confirm.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
6200 RPM motor output is routed through the POWERDRIVE Transmission to deliver more power from the motor to the cutting string.
AFS automatically feeds trimmer line when needed, so no bumping is required.
Converts from trimmer to edger in seconds for clean walks and beds.
Comes with one 2.0 Amp hour lithium ion battery pack and a wall mountable charging base.
Lightweight design with adjustable handle and height positions provide maximum comfort and control.
Design and Build Quality
The trimmer uses an orange and black body with a 12 inch cutting swath and steel deck. BLACK+DECKER calls it lightweight, and the handle and height can be adjusted for user comfort.
The listing does not confirm total unit weight or exact folded dimensions, so buyers who value compact storage should check the full owner's manual before purchase. The wall mountable charging base is included, which is a useful storage touch.
Performance in Everyday Use
The 6200 RPM POWERDRIVE Transmission is the main performance claim, and the Automatic Feed Spool means the line advances without bumping. The 2.0Ah battery is stated to deliver 33 percent more runtime than BLACK+DECKER's previous LBXR20 battery pack, but the actual minutes of runtime are not given.
The real limitation is that 12 inches is a modest cutting swath, and without a confirmed battery runtime in minutes, this is best suited to smaller yards or shorter trimming sessions rather than extended or heavy brush work.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Motor speed | 6200 RPM | Feature bullet states 6200 RPM with POWERDRIVE Transmission | 8.0 | Good speed for a 12 inch residential trimmer, but no torque or cutting power test data. |
| Feed convenience | Automatic Feed Spool | Listing states AFS automatically feeds line with no bumping required | 8.5 | Reduces downtime, though long term line feed reliability is not confirmed. |
| Battery runtime | 2.0Ah with 33 percent more runtime than LBXR20 | Feature bullet includes one 2.0 Amp hour lithium ion battery for 33 percent more runtime than previous LBXR20 | 6.5 | Claim is relative, not minutes, so real world runtime is unclear. |
| Cutting width | 12 inch swath | Feature bullet lists 12 in. cutting swath | 7.5 | Adequate for small yards but narrower than many mid size rivals. |
| Comfort | Adjustable handle and height | Feature bullet says lightweight design with adjustable handle and height positions | 8.0 | Adjustability helps fit, but total weight is not specified. |
Who Should Buy It
- Small to medium lawns
- Quick trimming and edging touch ups
- Homeowners switching from gas
- Cordless convenience with no bumping
- Users who want a wall mount charger
- People who need all day runtime or heavy brush cutting should skip it
- Listing does not confirm total weight or exact dimensions
- No stated runtime in minutes for the 2.0Ah battery
Full Specifications
How It Compares
| Feature | BLACK+DECKER | Typical option | Higher-tier option |
|---|---|---|---|
| Power source | 20V MAX lithium ion, 2.0Ah included | Often 20V to 24V with 2.0 to 4.0Ah batteries | Corded electric trimmer, unlimited runtime but cord management |
| Feed system | Automatic Feed Spool, no bumping | Bump feed or manual feed head | Fixed line or blade trimmer |
| Conversion | 2 in 1 trimmer and edger | May or may not convert to edger | Dedicated edger only |
| Cutting swath | 12 inch | 13 to 15 inch cutting swath | 10 inch or smaller swath |
| Included accessories | 2.0Ah battery and wall mount charging base | Battery and charger may be sold separately | No battery, corded design |
| Warranty | 2 Year Limited Warranty | 1 to 3 years typical | 90 day to 1 year limited |
Alternatives Worth a Look
This is a practical cordless 2 in 1 trimmer and edger for light to medium yard upkeep, with an auto feed spool and 12 inch cutting swath. Without confirmed runtime or weight, treat the 6200 RPM claim as a motor spec rather than a heavy duty guarantee.
Frequently Asked Questions
Does this trimmer convert to an edger?
Yes, it is a 2 in 1 string trimmer and edger that converts in seconds.
What battery and charger are included?
The listing confirms one 2.0 Amp hour lithium ion battery pack and a wall mountable charging base are included.
Is the trimmer line feed automatic?
Yes, the Automatic Feed Spool feeds trimmer line when needed with no bumping required.
What is the cutting swath?
The cutting swath is 12 inches.
Does the listing state the exact battery runtime?
No, it only says the 2.0Ah battery provides 33 percent more runtime than the previous LBXR20 battery pack; no minutes are stated.
What warranty does it have?
It includes a 2 Year Limited Warranty.
This review is based on the manufacturer's stated specifications, the current Amazon product listing and its images, the confirmed materials and design, and our own research into string trimmers as a product category. Our scores are editorial judgments made against consistent criteria, not laboratory measurements, and we did not carry out destructive or long-term stress testing.
Where the listing did not clearly confirm a detail, such as exact dimensions, weight or certifications, we have deliberately left it out rather than guess. If you are buying, always confirm the current specification and price on the live Amazon listing, since configurations and availability change.