BLACK+DECKER 20V MAX String Trimmer Review (2026): LSTE525 on Paper

Black+Decker 20V MAX string trimmer review: the short verdict

The LSTE525 is BLACK+DECKER’s 20V MAX answer to the small-yard trimmer: a 12-inch cordless string trimmer and edger with 2-speed control, EASYFEED line advance at the push of a button, and two LBXR20 lithium batteries plus the LCS1620 charger in the box. The PowerDrive transmission increases torque for more cutting power at the string, and the head converts from trimmer to wheeled edger for sidewalk edges. At 5.3 pounds with adjustable height and handle, it is built for comfort on residential lawns. The warranty is 2 years limited with a 30-day money back guarantee.

The trade-offs are battery-tool limits: 20 volts MAX is 18 volts nominal, and the 12-inch width is for maintenance trimming, not clearing overgrowth.

Key specs

Specifications are manufacturer rated, as published on the BLACK+DECKER listing and collected 19 October 2026.

Who the LSTE525 is for

• Owners of small to medium lawns who want cordless trimming without mixed fuel.
• Buyers who edge sidewalks: the head converts to a wheeled edger.
• Anyone already on the 20V MAX system: the LBXR20 batteries work across the platform.

The pick in the lineup

Below is our card for the LSTE525, with the Acre Score it earned.

What the LSTE525 does well

Two batteries in the box

The LSTE525 includes two LBXR20 20V MAX lithium batteries and the LCS1620 charger. Two batteries means double the runtime: trim on one while the other charges. For a cordless trimmer, the battery count is the runtime story, and this kit tells it well.

EASYFEED line advance

EASYFEED advances the line with the push of a button, no bumping required. Bump-feed heads wear out from ground strikes; a button feed keeps the head off the ground. It is a small feature that solves a common trimmer frustration.

Trimmer to edger in one tool

The head converts from trimmer to wheeled edger, so one tool trims the lawn and defines the sidewalk edge. The wheeled edger mode steadies the cut along hard edges.

2-speed control and PowerDrive

2-speed control lets you boost power for thick patches or extend runtime on light grass. The PowerDrive transmission increases torque for more cutting power at the string. At 7200 rpm on a 12-inch head, it is a maintenance trimmer, not a brush cutter.

Light and adjustable

At 5.3 pounds with adjustable height and handle and a premium soft grip, the LSTE525 fits different users and reduces fatigue on longer sessions. The micro texture grip adds comfort during use.

Limitations to know before you buy

20V MAX is 18V nominal

The listing states it plainly: maximum initial battery voltage measured without a workload is 20 volts; nominal voltage is 18. Expect 18-volt-class performance, which suits grass, not woody growth.

12 inches is a maintenance width

A 12-inch cutting width covers residential lawns fine but takes more passes on larger areas. It is not the tool for clearing an overgrown lot.

Runtime depends on the speed setting

Two batteries double the runtime, but the listing states no minute figures. High speed drains faster; low speed stretches the cut. Buyers with big lawns should plan around that.

Battery platform lock-in

The LBXR20 batteries suit the 20V MAX system, which is a plus if you own other 20V MAX tools and a minus if you do not: spare batteries cost extra outside the kit.

What the specs mean in practice

The 20V MAX system is BLACK+DECKER’s cordless platform: one battery style across many tools. In the LSTE525, two LBXR20 batteries feed a 7200 rpm motor through the PowerDrive transmission, turning a 12-inch string head. EASYFEED replaces bump feeding with a button press. The wheeled edger conversion lets the head cut vertically along edges. At 5.3 pounds and 41.13 by 9.13 inches, it stores easily and carries lightly. The 2-year limited warranty with 30-day money back is the stated protection; keep the receipt.

The 20V MAX system and the POWERCOMMAND family

The LSTE525 is not a lone tool; the listing places it in two lineups. First, it is part of the 20V MAX system, which the listing pitches as one battery style across many tools. The two LBXR20 lithium batteries in this kit fit other 20V MAX tools, so a buyer who already owns the platform gains two more batteries in the rotation, and a first-time buyer gets an entry point with room to grow. Second, it belongs to the POWERCOMMAND family, which the listing describes as features that solve common outdoor power equipment frustrations: EASYFEED for line advance, plus POWERCUT and POWERBOOST, which the listing names but does not detail for this model. The buying advice is straightforward: if you own 20V MAX tools, this kit deepens the bench; if you do not, weigh the platform commitment, because spare LBXR20 batteries cost extra outside the kit.

Speed, torque and what 7200 rpm means on a 12-inch head

The listing gives the LSTE525 two related performance claims: a 7200 rpm 2-speed head and a PowerDrive transmission that increases torque for more cutting power at the string. The 2-speed control is the one you will use every session: the listing says it lets you boost power or extend runtime, so run low speed on light grass to stretch the two batteries and switch to high for thick patches. Torque, not rpm alone, decides how the head feels in the cut; the PowerDrive claim is the maker’s answer to the usual battery-trimmer complaint of bogging down. Set expectations from the numbers: 7200 rpm on a 12-inch head with an 18-volt nominal battery is a maintenance-trimmer package, quick and light on weekly grass, out of its depth in woody growth. That is exactly the small to medium lawn the acreage tags describe.

Kit contents and what to check on arrival

The listing is specific about what ships: one LSTE520 20V MAX EASYFEED trimmer, two LBXR20 20V MAX lithium batteries, the LCS1620 charger, a guard, an AFS spool, the user manual, a quick start guide and a 2-year warranty card. The spec table phrases the battery count as 2 lithium ion batteries required and included. On arrival, confirm both batteries, the guard and the spool are in the box, and keep the warranty card with the receipt: the stated protection is a 2-year limited warranty with a 30-day money back guarantee, and the receipt is your proof of date. The trimmer is orange and black, measures 41.13 by 9.13 inches and weighs 5.3 pounds, so it hangs on a garage wall or stands in a corner without demanding a shelf. Charge both batteries before the first session so the double-runtime story the listing promises is real from day one.

Who should skip the LSTE525

• Owners of large or overgrown properties; a 12-inch 18V-nominal trimmer is not a clearing tool.
• Anyone who needs gas-level power for thick brush or saplings.
• Buyers outside the 20V MAX system who want a different battery platform.

Alternatives

Keep any trimmer running with our string trimmer maintenance guide.

FAQ: mowing large lots

How wide does the LSTE525 cut?

12 inches, on a 7200 rpm 2-speed head.

Is the LSTE525 gas or battery?

Battery: 20V MAX (18V nominal) with two LBXR20 lithium batteries and the LCS1620 charger included.

How does the line advance?

EASYFEED: push a button, no bumping required.

Can it edge sidewalks?

Yes. The head converts from trimmer to wheeled edger.

What is the warranty?

A 2-year limited warranty with a 30-day money back guarantee, stated in the listing.

More mowing guides

• String Trimmer Maintenance: Step-by-Step Care Guide
• Trimmer String Size Chart