Updated September 16, 2026. Disclosure: As an Amazon Associate, we earn from qualifying purchases.
Quick answer: The EGO ST1623T is the strongest all-around choice in this group for homeowners who want a wide cutting path and less fuss when feeding or loading line. LINE IQ automatically maintains line length, while POWERLOAD winds replacement line at the push of a button. Its main tradeoffs are price and working weight.
Our verdict: Best for medium and large yards, established weeds, and homeowners already using EGO 56V batteries. Buyers with a small yard or limited arm and shoulder endurance can spend less and carry less with the BLACK+DECKER LSTE525.
Check the EGO ST1623T price on Amazon →
Research note: This is a research-based review. We have not personally tested this string trimmer. We reviewed current manufacturer specifications, the owner manual where available, warranty terms, kit contents, battery compatibility, and current owner-feedback patterns.
Compare this model with the other picks in our best cordless string trimmers guide, or browse the electric string trimmer hub.
EGO ST1623T specifications
| Battery platform | EGO 56V ARC Lithium |
|---|---|
| Cutting path | 16 inches |
| Line | Dual 0.095-inch spiral-twist line |
| Feed and loading | LINE IQ automatic feed; POWERLOAD automatic winding |
| Motor and speed | Brushless; digital two-speed selector with variable trigger |
| Shaft | Telescoping carbon fiber |
| Bare-tool weight | 7.5 lb |
| Included kit | 4.0Ah battery and 320W charger |
| Manufacturer runtime | Up to 60 minutes with included 4.0Ah battery |
| Weather rating | IPX4 |
| Warranty | 5-year tool, 3-year battery; lifetime shaft warranty requires registration within 90 days |
Best for
- Owners of EGO 56V mowers, blowers, or other yard tools.
- Long fence lines and larger lawns where a 16-inch swath saves passes.
- Anyone frustrated by bump-feed heads or hand-winding new line.
- Thicker grass and ordinary residential weeds that benefit from 0.095-inch line.
Consider another model if
- Small yards where a lighter 12- or 13-inch trimmer is enough.
- Buyers who want a true pivoting edger with a guide wheel.
- Anyone sensitive to tool-plus-battery weight during long sessions.
- Budget shoppers who will not use the wider EGO battery system.
LINE IQ and POWERLOAD solve different problems
LINE IQ monitors line length while you work and feeds more line without requiring a bump against the ground. POWERLOAD handles the separate job of winding replacement line onto the head. Together they remove two common interruptions, although they also make the head more complex than a basic bump-feed design. EGO owner feedback is strongly positive overall, but recent reviews on EGO’s own page include some reports of failed POWERLOAD buttons or feed behavior. The five-year tool warranty matters more on this model than it does on a simpler head.
Cutting performance and control
A continuous 16-inch swath and professional-size 0.095-inch dual line put the ST1623T toward the high end of residential cordless trimmers. The two-speed selector lets you limit speed around delicate beds and fencing, then use the higher range in thicker growth. The variable trigger still provides control within either range. It is designed for grass and weeds, not woody brush; use a brush cutter or pruning tool for material the line cannot cut cleanly.
Runtime, weight, and balance
EGO states up to 60 minutes with the included 4.0Ah battery. Treat that as a controlled manufacturer figure: high speed, dense growth, frequent restarts, temperature, and technique change actual runtime. The bare tool weighs 7.5 pounds, so the battery raises the working weight. The telescoping shaft and adjustable front handle help fit the tool, but they do not remove the load. A shoulder strap can help during longer sessions.
Battery-platform value
All EGO 56V batteries work across the company’s residential 56V tools. That makes the kit easier to justify if you already own an EGO mower or blower. Larger packs can extend runtime but add weight at the rear. New EGO buyers should price the complete kit, replacement line, and any shoulder strap rather than comparing bare-tool prices.
Pros and cons
Pros
- Automatic line feed without bumping
- Push-button line winding
- Wide 16-inch cutting path
- Brushless motor and 0.095-inch line
- Telescoping carbon-fiber shaft
- Strong EGO battery ecosystem and long tool warranty
Cons
- Premium price
- Battery raises the 7.5-pound bare-tool weight
- Not a wheeled edger
- More complex head than a basic bump-feed design
- Advertised runtime varies with conditions
Final recommendation
Best for medium and large yards, established weeds, and homeowners already using EGO 56V batteries. Buyers with a small yard or limited arm and shoulder endurance can spend less and carry less with the BLACK+DECKER LSTE525.
Frequently asked questions
Does the ST1623T include a battery and charger?
Yes. The ST1623T kit includes a 4.0Ah battery and 320W charger. The ST1620T is the corresponding tool-only model.
Does the EGO ST1623T need to be bumped on the ground?
No. LINE IQ is designed to maintain line length automatically. POWERLOAD winds replacement line after you feed it through the head.
Can it edge a sidewalk?
It can be turned for occasional edging, but it does not have the pivoting head and guide wheel found on dedicated trimmer-edgers. Its size also makes precision edging more demanding.
Can other EGO batteries power it?
Yes. EGO states that all of its 56V ARC Lithium batteries are compatible. Larger batteries add runtime and weight.
Is the ST1623T waterproof?
No. EGO lists an IPX4 weather-resistance rating. That covers splashing, not immersion or unsafe operation in wet conditions.
Sources and review method
Specifications and package details can change. Match the exact model number and included-items list before ordering. Manufacturer runtime and noise figures are conditional claims, not guarantees.
Read our affiliate disclosure and learn more about our research process.