Best Electric & Battery String Trimmers 2026 ▷ Cordless Picks

Battery string trimmers have overtaken gas as the go-to for homeowners — lighter, quieter, and modern 40V–56V models deliver the power to handle any standard residential lawn. No fuel mixing, no pull-cord starting, no winterizing. Press a button and start trimming.

The 2026 battery trimmer market has matured to the point where the top models genuinely rival entry-level gas in cutting performance. Brushless motors run cooler and last longer, battery energy density has improved 25–30% over just three years ago, and features like EGO's POWERLOAD automatic line winding have eliminated the most frustrating part of trimmer ownership. For lots under 1/4 acre with standard grass and weeds, there's no practical reason to choose gas anymore. Here are the top picks for 2026, from value buys to premium cordless powerhouses.

Best electric & battery string trimmers 2026

Comparison table

Model	Voltage	Swath	Shaft	Battery incl.
EGO ST1521S	56V	15"	Straight (split)	No (buy separately)
DEWALT DCST925B	20V MAX	13"	Curved	Tool only
Greenworks ST40B210	40V	13"	Straight	2Ah + charger ✓

Buying guide

The most important decision: do you already own batteries in a brand's ecosystem? If you have DEWALT 20V MAX batteries from your power tools, the DCST925B (tool-only purchase) is the obvious choice — you're buying just the trimmer for $60–$80 less than a kit. If you're starting fresh with no existing batteries, the Greenworks 40V kit (battery + charger included) is the best-value entry point — everything you need in one box. If you want premium performance and plan to build a full cordless outdoor kit (trimmer, mower, blower, chainsaw), EGO 56V is the highest-performing platform and the battery investment pays off across the entire lineup.

Beyond brand ecosystem, look at the cutting swath. A 15-inch swath (EGO) covers 15–20% more ground per pass than a 13-inch swath (DEWALT, Greenworks), which adds up over a full trimming session. For small, simple yards, 13 inches is fine. For anything over 5,000 square feet of lawn edge and garden border, the wider swath saves meaningful time.

Battery platform comparison

EGO 56V — the highest performance in the battery segment. The 15-inch swath and brushless motor handle .095" line in thick weeds without bogging down. The 56V Arc-Lithium battery is compatible with EGO mowers, chainsaws, blowers, hedge trimmers, and snow blowers — one battery ecosystem for the entire yard. The standout feature is POWERLOAD automatic line winding: press a button, feed line into the head, and the motor winds it perfectly onto the spool. No more fumbling with wound line or disassembling the head in the field. At $170–$200 (tool only), it's a premium purchase, but the build quality and feature set justify the price.

DEWALT 20V MAX — the most versatile battery platform in existence, powering over 300 tools across construction, automotive, and outdoor categories. The DCST925B uses a gear-drive transmission that increases torque at the cutting head compared to direct-drive designs, compensating for the 20V platform's lower voltage. The 13-inch swath and curved shaft make it compact and manoeuvrable. Best for DEWALT owners who want to add trimming capability without buying into a second battery ecosystem.

Greenworks 40V — the best value kit with battery and charger included in the box. The 40V platform is a meaningful step up from 20V in power delivery, handling most residential trimming without compromise. The straight-shaft design gives better reach under shrubs and along fences. The battery also powers Greenworks mowers, blowers, and chainsaws, making it a solid starter ecosystem for budget-conscious homeowners who want cordless convenience across multiple tools.

Corded vs. battery: which is better?

Corded electric trimmers ($25–$60) still make sense for a very specific use case: small, simple yards with an outdoor outlet within 50–75 feet of your trimming area. They weigh just 4–5 lbs, never run out of power, cost almost nothing, and last for years with zero maintenance. For a townhouse with a 10-foot strip of grass to edge, a corded trimmer is the most economical and sensible choice.

The cord, however, is genuinely annoying to manage in anything beyond a simple layout. Trimming around flower beds, fence posts, trees, and garden furniture means constantly redirecting the cable, checking that you haven't looped it around an obstacle, and hoping you don't accidentally cut through it (which happens more often than people admit). For any yard that isn't a straightforward rectangle alongside a house, a battery trimmer with a 40V or 56V platform is worth the extra $80–$150. The freedom of movement makes trimming faster, less frustrating, and safer.

Trimmer line selection guide

Most 20V battery trimmers come loaded with .065" line — fine for light grass and edging. For medium-duty residential trimming (typical grass edges, occasional weeds), upgrade to .080". For 40V–56V models handling thick weeds: .095" delivers faster cutting and longer life per reload. Always match the diameter to the manufacturer's specified range — overstocking the head with thick line stresses the motor and wears the feed mechanism faster. Round line is the most common and works well for all residential tasks. Pre-soak new nylon line in water for 30 minutes before loading — it becomes more flexible and breaks less frequently during the first few hours of use.

Line types and replacement strategies

Trimmer line comes in several styles beyond simple round cord. Round line is the universal standard for general lawn edging and light weed control — it's forgiving of rocks and hard surfaces because the geometry naturally deflects impact. Twisted line (or spiral-wound) has slightly higher cutting force than round because the twisted geometry creates sharper edges, making it better for thick weeds and tougher growth. Multi-sided or square line offers the most aggressive cutting but is more fragile and wears faster — reserve this for dedicated heavy-duty work. For most residential use, stick with round line in the correct diameter for your trimmer; the performance-per-durability ratio is best, and replacements are cheapest.

Bump-feed vs. auto-feed heads affect how you manage line replacement during work. Bump-feed requires you to tap the head on the ground to advance fresh line when the current line gets short — manual but simple, with fewer moving parts to break. Auto-feed (found on models like the EGO ST1521S with POWERLOAD) automatically advances line as it wears, eliminating the frustration of mid-job reloading. Over a season of trimming, auto-feed saves real time and mental friction — you never tap the head wondering if new line will feed, you just trim until the battery dies. The trade-off is slightly more complexity and cost, but for regular users, it's worth the premium.

Trimmer techniques: edging, clearing, and precision work

Most users hold a string trimmer the same way they hold a broom — vertically, spinning the head parallel to the ground. This works fine for clearing overgrown weeds, but it's inefficient for the primary residential task: edge trimming along driveways, sidewalks, and garden beds. Proper edging requires tilting the trimmer so the string spins vertically, then walking along the edge with the guard facing inward (protecting the grass). This creates a clean, defined edge. Many homeowners avoid edging because they've never been shown the correct technique; once you master the 90° tilt, you'll spend 80% of your trimming time in this position.

For dense weeds and overgrown areas, use a straight-shaft trimmer (EGO ST1521S, Greenworks ST40B210) and angle the head slightly forward (about 20° from vertical). This creates a sweeping motion that cuts faster than a perpendicular approach and reduces line breakage. Walk at a steady pace — rushing causes uneven cutting and line snapping. The head should pass through the vegetation smoothly; if the line is chattering or stalling, you're likely moving too fast or hitting overly thick growth. For precision work near obstacles (trees, fence posts, garden furniture), slow down and hold the trimmer steady rather than attempting fast passes.

Battery conservation matters during longer trimming sessions. Running a 40V–56V trimmer at full throttle drains the battery 25–30% faster than using moderate throttle. On most trimmers, the trigger controls speed; using 70–80% throttle instead of full throttle extends runtime significantly with minimal loss of cutting speed. You'll notice the difference only on stubborn growth; for standard grass edges, moderate throttle is plenty. Many experienced users keep two batteries: one charging while they trim with the other, ensuring zero downtime on large properties.

Battery and motor maintenance for longevity

Battery lifespan (typically 3–5 years) depends heavily on storage and charging habits. Lithium-ion batteries degrade fastest when stored fully charged for extended periods. The ideal approach: fully charge only a day or two before use, then store at 50% charge during the off-season (winter). If your trimmer won't be used for 3+ months, remove the battery, charge it halfway, and store it indoors at room temperature (not in a garage that freezes or gets extremely hot). Never leave a battery connected to a charger overnight; modern smart chargers stop charging when full, but even trickle charging reduces long-term battery health.

Motor maintenance for brushless trimmers is minimal — there are no brushes to wear — but cooling is critical. The motor vents heat through small openings in the motor housing; if these vents get clogged with grass clippings and dust, the motor overheats and shuts down prematurely. After heavy trimming sessions (30+ minutes continuous), remove clipped grass and debris from the motor vents using compressed air or a soft brush. Store the trimmer with the motor facing downward (if the design allows) so dust doesn't settle inside. Never store a still-hot trimmer; allow it to cool for 5–10 minutes before putting it away.

Line loading and head assembly: inspect the bump-head or auto-feed spool every 2–3 months for cracks or wear. If the spool is damaged or the line eyelets are rough (causing constant breakage), replacing the spool ($10–$20) is far cheaper and faster than constantly reloading damaged heads. For models with fixed heads (non-removable), use only the manufacturer's specified line diameter — forcing thicker line into a head designed for .080" eventually damages the feed mechanism, and replacement heads often cost $30–$50. Greenworks and EGO head assemblies are user-replaceable; DEWALT heads usually require dealer service or YouTube videos for DIY replacement.

Seasonal considerations and weather impacts

Wet grass is vastly more difficult to trim than dry grass — the blade clogs with wet clippings, reducing cutting efficiency by 40–50%, and the added friction stresses the motor. Always trim after the morning dew dries (typically 10 AM or later) and never trim immediately after rain. In regions with frequent rain (Pacific Northwest, UK-like climates), trimming is most effective on the driest days available. Conversely, in hot, dry climates, trimming in the early morning before heat stress sets in extends battery runtime and motor life by 15–20%.

Seasonal battery performance: lithium-ion batteries lose 10–15% of their capacity in freezing temperatures (below 32°F / 0°C). If you live in a cold climate and trim year-round, expect reduced runtime in winter. Warming the battery indoors for 30 minutes before use partially restores capacity, but don't expect full performance below 50°F. Spring and autumn are ideal trimming seasons — temperatures are moderate, grass growth is vigorous, and battery performance is optimal. In summer, trim early before heat peaks; in winter, trim mid-day when temperatures are warmest.

Frequently asked questions