● String Trimmers · Review

EGO Power+ ST1521S 15-Inch String Trimmer

Pivoting head locks cleanly into edging position without extra tools

✎ PickHonest Research Desk▦ Updated October 15, 2026◷ 3 min read

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EGO Power+ ST1521S 15-Inch String Trimmer

EGO Power+ ST1521S 15-Inch String Trimmer

EGO

Pivoting head locks cleanly into edging position without extra tools

15-inch cutting swath with POWERLOAD auto-feed line
56V ARC Lithium battery, 2.5Ah included
Carbon fiber split shaft
Pivoting head for vertical edging
Brushless motor

Pros

Pivoting head locks cleanly into edging position without extra tools
POWERLOAD auto-feed threads new line in seconds, useful after a long edging session wears the line down
56V battery has enough torque to run the line against curb edges without bogging
Carbon fiber shaft keeps the tool light for one-handed edging control

Cons

56V battery and charger add cost versus 40V competitors
Proprietary EGO battery doesn't cross over to other brands
No built-in guide wheel, so depth control is by feel

Prices and availability change, so confirm on Amazon.View on Amazon

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