EGO Power Powerload ST1521S 15 in. 56 V Battery String Trimmer Kit
Best powerful trimmer for homeowners seeking effortless line changes.
The EGO Power Powerload ST1521S is a 15-inch, 56V battery string trimmer kit featuring the world's first Powerload Technology, which automatically winds the trimmer line with the push of a button. It boasts a carbon fiber shaft with a lifetime warranty, a high-efficiency brushless motor, and a dual-feed spiral twist .095-inch professional cutting line. This trimmer offers variable speed control and a bump feed line advance for convenient operation. It comes with a 2.5Ah 56V ARC Lithium battery and charger, making it a complete kit for tackling yard work.
$229.00
Owner Satisfaction
4.6
/ 5
Category Rank
17
/ 123
#17 in Weed Trimmers
Price vs Category Average
+14%
Above average
Model Number
1521
/ STS
Who it's for
- Homeowners tired of manually winding trimmer line
- Gardeners seeking powerful, eco-friendly yard maintenance
- Existing EGO Power+ tool owners or those building a system
Who should skip it
- Users with expansive yards needing continuous, long-duration operation
- Individuals sensitive to tool weight or with physical limitations
- Budget-conscious buyers prioritizing the lowest upfront purchase price
Performance breakdown
Line Reloading Speed
Powerload technology eliminates the frustration of manual string winding entirely.
Build Durability
The carbon fiber shaft offers a premium, lightweight, and rugged feel.
Cutting Efficiency
Brushless motor and dual-feed line slice through thick weeds with ease.
Battery Runtime
The 2.5Ah battery is sufficient for standard lawns but limited for acreage.
Operational Comfort
Adjustable handle and balanced design reduce fatigue during extended trimming sessions.
Ease of Assembly
Straightforward setup gets you from the box to the yard quickly.
Key Specs
Model Number
ST1521S
Brand Name
EGO
Sub Brand
Power Powerload
Cutting Width
15 in.
Volts
56 V
Powered By
Battery
Product Type
String Trimmer
Kit or Tool Only
Kit (Battery & Charger)
Features
- Powerful 56V ARC Lithium™ Battery System
- Durable and Lightweight Carbon Fiber Shaft
- Automatic Line Feed System for Continuous Cutting
- Anti-Vibration System for User Comfort
- Ergonomic Adjustable Wrap-Around Handle
- Dual-feed spiral twist line for clean cuts
- Cordless Operation for Freedom of Movement
- Straight Shaft Design
- Includes battery and charger for immediate use
- Includes Edger Attachment
What customers say
Customers consistently praise the EGO Powerload ST1521S for its exceptional ease of use, particularly the innovative Powerload head which simplifies line replacement. Users frequently highlight its robust power, noting it effortlessly tackles tough weeds and overgrown areas. The product's overall quality and reliable performance are also strong points, contributing to a highly positive user experience. Many appreciate the convenience of the 56 V battery system, offering ample run time for typical yard tasks. This trimmer is often seen as a significant upgrade, delivering efficiency and satisfaction.
Know before you buy
Powerload Technology eliminates the frustration of manually winding trimmer line. Once you feed the line through the head, you simply press a button, and the trimmer automatically winds the line onto the spool for you.
Yes, the carbon fiber shaft is exceptionally strong and lightweight, which helps reduce fatigue during longer trimming sessions. EGO is confident enough in its durability to offer a lifetime warranty on the shaft itself.
Yes, this is a complete kit. It comes with the 15-inch string trimmer, a 2.5Ah 56V ARC Lithium battery, and the corresponding charger, so you can begin using it as soon as the battery is charged.
No, this specific model (ST1521S) is not attachment-capable. It is designed as a dedicated string trimmer, so you cannot swap the head for other tools like a pole saw or hedge trimmer.
This trimmer is designed to use a .095-inch diameter professional cutting line. Using the recommended line size ensures the best performance and prevents potential issues with the automatic feed system.
The bump feed system allows you to advance the line while the trimmer is running. By tapping the trimmer head against the ground, the internal mechanism releases a small amount of fresh line so you can continue working without stopping.
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