# Which string trimmer offers the best battery life? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which string trimmer offers the best battery life?

## Products

### EGO ST1511T 15-Inch Powerload 56V String Trimmer
```yaml
product: ego-st1511t-15-inch-powerload-56v-string-trimmer
brand: EGO
price_gbp: null
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 10.6 lbs
voltage: 56 V
line_type: 0.095 in dual spiral-twist
power_source: Battery
cutting_width: 15 in
adjustable_handle: Telescopic aluminum shaft
```

- **Price:** £None [^1]
- **Summary:** The EGO ST1511T is a 15 in battery-powered string trimmer with POWERLOAD automatic line winding, a brushless motor, and a telescopic shaft; it includes a 56 V 2.5 Ah battery and charger and delivers up to about 45 minutes run time on the included battery. It uses professional-grade 0.095 in dual spiral-twist line and offers variable speed and weather-resistant construction, suitable for homeowners wanting near-gas power without cords. 
- **Ideal For:** Ideal for best battery life comparison because it uses the 56 V ARC Lithium platform and the kit includes a 2.5 Ah battery that delivers up to 45 minutes run time on a single charge.

### DeWalt DCMST561N-XJ 18V XR Li-Ion Brushless String Trimmer
```yaml
product: dewalt-dcmst561n-xj-18v-xr-li-ion-brushless-string-trimmer
brand: DeWalt
price_gbp: 127.61
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 3.5 kg
voltage: 18 V
line_type: 2.0 mm Quick Load spool
power_source: Battery
cutting_width: 36 cm
adjustable_handle: true
```

- **Price:** £127.61 [^2]
- **Summary:** Brushless 18 V cordless string trimmer with a 36 cm cutting width, foldable design, two-speed control, and Quick Load 2.0 mm spool for fast line replacement. Lightweight and compact with an adjustable second handle, suited for homeowners and pros needing portability and solid cutting performance without cord or petrol.
- **Ideal For:** Best for battery life comparisons because it uses an 18 V XR brushless motor designed for longer run time and accepts 18 V XR Li‑Ion batteries up to 5.0 Ah.

### Greenworks ST60L414 60V Cordless String Trimmer
```yaml
product: greenworks-st60l414-60v-cordless-string-trimmer
brand: Greenworks
price_gbp: 246.53
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 7.6 lbs
voltage: 60V
line_type: .105 in twisted
power_source: Battery
cutting_width: 17 in
adjustable_handle: true
```

- **Price:** £246.53 [^3]
- **Summary:** Brushless 60V cordless string trimmer with a carbon-fiber straight shaft, dual-feed bump head, and a 17 in cutting path; includes a 4.0 Ah battery and charger and offers variable speed and two-speed control. Lightweight construction and a long runtime make it suitable for homeowners who want gas-equivalent power without fumes or maintenance.
- **Ideal For:** Ideal for best battery life because it ships with a 4.0 Ah 60V battery providing up to 60 minutes runtime on a single charge, longer than comparable kits with smaller batteries.

### Ryobi 40V 17-Inch Expand-It Cordless String Trimmer Kit
```yaml
product: ryobi-40v-17-inch-expand-it-cordless-string-trimmer-kit
brand: Ryobi
price_gbp: 178.55
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 12.2 lbs
voltage: 40V
line_type: .105 in
power_source: Battery
cutting_width: 15-17 in
```

- **Price:** £178.55 [^4]
- **Summary:** A 40V battery-powered, brushless Expand-It string trimmer with an adjustable 15 to 17 in cut swath, REEL EASY+ 3-in-1 head that accepts heavy .105 in line, carbon fiber shaft for reduced weight, and variable speed with 2-speed switch. Sold as a kit with a 40V 6.0 Ah or 4.0 Ah battery depending on the listing, it suits users who want gas-level power with quieter operation and attachment capability.
- **Ideal For:** Best for longest battery life because the kit offers up to 67 minutes runtime with a 40V 6Ah battery and up to 65+ minutes in some listings, providing substantially longer runtime than models with smaller batteries.

### Toro 60V 17-Inch Battery String Trimmer Kit
```yaml
product: toro-60v-17-inch-battery-string-trimmer-kit
brand: Toro
price_gbp: 224.13
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: null
voltage: 60V Max
line_type: Single 0.095 in
power_source: Battery
cutting_width: 15 - 17 in
adjustable_handle: Telescoping
```

- **Price:** £224.13 [^5]
- **Summary:** Brushless 60V battery trimmer with a carbon-fiber telescoping shaft, twist-to-load bump head, variable speed and up to 45 minutes runtime from the included 2.5 Ah battery. It's lightweight, collapsible for storage, and includes charger and battery, targeting residential users who want cordless convenience and professional features.
- **Ideal For:** Best for battery-life comparison because it includes a 60V Max L135 2.5Ah battery with up to 45 minutes runtime and compatibility with Toro 60V batteries for extended run time.

---
## References & Sources
[^1]: Acme Tools, accessed 2026-06-14. https://www.acmetools.com/ego-power-powerload-string-trimmer-15in-st1511t/692042012853.html
[^2]: Klium, accessed 2026-06-14. https://www.klium.com/en/dewalt-dcmst561n-xj-18v-xr-cordless-grass-trimmer-36cm-without-battery-and-charger-128541
[^3]: Tractor Supply, accessed 2026-06-14. https://www.tractorsupply.com/tsc/product/greenworks-60v-17-in-brushless-cordless-battery-string-trimmer-attachment-capable-25-ah-battery-charger
[^4]: RYOBI (alternate listing), accessed 2026-06-14. https://www.ryobitools.com/products/46396039552?variant=RY402011BTL
[^5]: Men's Journal (product link/reported price), accessed 2026-06-14. https://www.mensjournal.com/home-living/toro-60v-max-17-inch-telescoping-carbon-fiber-shaft-string-trimmer-review