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10 Best Cordless String Trimmers
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Buying Guide for the Best Cordless String Trimmers
Choosing a cordless string trimmer can make yard maintenance much more convenient by freeing you from the limitations of a power cord. The ideal model for you depends on the size and type of your yard, how often you plan to use the tool, and your comfort with weight and run time. Identifying your needs—such as whether you’ll be trimming grass along a small urban walkway or clearing heavy weeds in a large yard—will guide you to the right features and specs.Battery VoltageBattery voltage indicates the power output of the trimmer. A higher voltage generally means more power, allowing the trimmer to cut through thicker or tougher grass and weeds. Voltage ratings for cordless trimmers typically range from 18V on the lighter end to 80V or more for heavy-duty use. If you’re trimming only light grass in a small yard, a lower voltage trimmer will likely be sufficient, saving weight and possible cost. For tougher jobs or larger areas, go for higher voltage, as it will both improve performance and possibly extend run time.
Battery Capacity (Ah)Measured in amp-hours (Ah), battery capacity tells you how much electrical energy the battery can store, which directly affects run time before needing a recharge. Lower capacities like 1.5–2 Ah are found in lighter trimmers and are suitable for quick jobs. Higher capacities, such as 4–5 Ah, allow for longer operation on one charge. If you typically do short trims, a lower capacity might be enough, but for extended sessions or larger properties, a higher capacity battery is preferable to avoid frequent recharging.
Cutting SwathCutting swath refers to the width of grass the trimmer can cut in a single pass, usually measured in inches. Smaller swaths (10–12 inches) are ideal for detail work or small spaces, allowing more control around obstacles. Larger swaths (13–16 inches or more) help you cover ground faster in open areas. Think about where you’ll be using the trimmer most—tight corners and maneuverability favor a smaller swath, while efficiency in big areas suggests getting a wider one.
Line Feed SystemThis describes how the string trimmer advances more line as it wears down. There are manual, bump-feed, and automatic feed systems. Manual requires you to stop and feed more line by hand; bump-feed dispenses more line when you tap the trimmer head on the ground; auto-feed releases line automatically as needed. Auto-feed is easiest for most users, ensuring you maintain the right line length without much thought. Bump-feed offers more control and tends to be favored for heavier use, while manual systems are basic but can slow you down. Choose based on your preference for convenience versus control.
WeightThe weight of a trimmer impacts how comfortable and easy it is to handle, especially during longer tasks. Lighter models are easier to maneuver and less tiring for prolonged use, which is particularly important for smaller individuals or anyone with limited strength. Heavier trimmers often provide more power or larger batteries, but may become uncomfortable to hold for long periods. Consider how long you typically use the tool and your strength or stamina when deciding what weight range is suitable.
Adjustability and ErgonomicsFeatures like adjustable handles, telescoping shafts, and rotatable heads can make a trimmer more comfortable and adaptable for both the user's height and different types of trimming tasks (such as edging versus flat trimming). If you have specific needs for comfort, varied use, or multiple people using the tool, look for models with more adjustability so you can find the best fit and working position.
Compatibility with Battery SystemsSome trimmers are part of a larger system of tools that use the same battery type. If you already have other cordless tools from a particular brand, picking a trimmer that uses the same battery can save money and increase convenience, as you can swap batteries between tools. If this is your first cordless yard tool, consider whether you might want to expand to more battery-powered tools in the future, as this can help future-proof your purchase.