BLACK+DECKER 20V MAX String Trimmer and Edger 2 in 1
- 12 inch cutting width, steel deck
- 2-in-1: string trimmer and wheeled edger
- 20V MAX battery and charger included
- Automatic spool feed
- PowerDrive transmission, 33% more runtime
- 6200 rpm listed
- 5.7 pounds, 36.23 inches long
- 2 year limited warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A cordless trimmer and edger in one for routine lawn cleanup, with the battery and charger in the kit. Runtime is given only as a percentage gain, with no minutes stated.
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ASIN: B00HH4K4HQModel: LST300Category: String Trimmers
Overview
Along sidewalks, lawn borders and overgrown corners, the LST300 works as a string trimmer and converts to a wheeled edger. Adjustable height and handles with micro texture grips let the user tailor the fit.
Two tools in a single frame mean one purchase handles both trimming and edging, and the battery can be swapped across other Powerconnect tools. The runtime gain is relative, so plan on a recharge for larger jobs.
Who it's for
Homeowners with a modest yard who want one battery tool for trimming and edging. Anyone with acres to maintain needs a longer-running option.
Pros and cons
- Converts between trimmer and wheeled edger
- Automatic spool feed advances line
- Battery and charger included
- Battery works across Powerconnect tools
- Runtime in minutes not listed
- Mode change needs a conversion
Performance notes
The PowerDrive transmission adds torque at the string, which helps against heavy weeds and overgrowth. Automatic spool feed advances line without bumping the head. In edger mode the wheel guides the cut along a border.
Where it stands among string trimmers
- #6 most-searched brand and model of the 13 string trimmers lines we track (by search demand, not sales).
From the specs of the 15 string trimmers we list; not a test result.
Specifications
| Model | LST300 |
|---|---|
| Dimensions & fit | |
| Cutting width | 12 inches |
| Dimensions (L x W) | 36.23 x 8.5 inches |
| Item weight | 5.7 pounds |
| Capacity & performance | |
| Speed | 6200 rpm |
| Power & efficiency | |
| Power source | Battery powered |
| Voltage | 20V MAX |
| Battery | LBXR2020 lithium ion, 2 amp, included |
| Warranty & support | |
| Warranty | 2 year limited |
| Other details | |
| Charger | Included |
| Line feed | Automatic spool feed (AF-100 spool) |
| Modes | String trimmer, wheeled edger |
Frequently asked questions
Is the BLACK+DECKER LST300 a lawn mower?
No. It is a string trimmer that converts to a wheeled edger. The listing describes no mowing mode.
Can the LST300 battery be used in other BLACK+DECKER tools?
The description says it is part of the 20V MAX Powerconnect System, so the battery can be swapped between Powerconnect tools.
What comes with the BLACK+DECKER LST300?
The components list the trimmer and edger, an LBXR2020 lithium ion battery, a charger, an AF-100 spool and a guard.