A rechargeable battery runs the trimmer head, and edging happens either by rotating that head 90° or by clicking a separate edger attachment onto a shared power head.
For the full breakdown, see our best Battery Powered Edger Trimmer guide.
One battery, two jobs, no pull cord — that’s the whole sales pitch. And it holds up, with one catch that decides whether a combo suits your yard: runtime shrinks the moment you switch from trimming to edging. Here’s how these tools actually convert, what the current EGO and Genesis systems include, and where the limits show up.
How Does A Battery Powered Trimmer And Edger Combo Actually Work?
The tool runs on one rechargeable battery that powers a string trimmer head; edging comes from either rotating that head into a vertical position or mounting a dedicated edger attachment on a compatible power head.
The two formats behave differently in practice:
- Rotating-head trimmer/edgers — a single unit. You flip the motor head 90° and the spinning line faces down into the turf line along a sidewalk or driveway.
- Multi-head systems — one power head accepts interchangeable attachments. Trim with the string trimmer attachment, then swap on the edger attachment for a clean trench line.
EGO’s multi-head kit is the clearest example of the second format. Its official product page describes one power head running a string trimmer attachment and an edger attachment on the same 56V ARC Lithium battery platform, so the battery and charger you already own feed every attachment.
What Conversion Looks Like On A Real Unit
Genesis spells out the rotating-head procedure in its GLGST20B operator’s manual, and the order matters for safety: remove the battery first, press and hold the head rotation locking button, rotate the motor head 90° clockwise, then release the button to lock it into edger position.
That’s the entire conversion on a single-unit model — no tools, no fasteners, roughly ten seconds. On a multi-head system the swap is a coupling: press the release, pull the trimmer attachment, seat the edger attachment until it clicks. EGO’s product listings confirm the included components and battery compatibility but don’t publish step-by-step assembly instructions, so follow the printed manual that ships in the box.
What To Expect: Runtime, Noise, And Upkeep
A battery combo starts instantly, runs far quieter than gas, and skips the maintenance list entirely — no oil changes, no carburetor, no fuel stabilizer, no seasonal pull-cord frustration. EGO frames the payoff as gas-like torque and blade speed without fumes or carburetor headaches.
| Task Mode | EGO Runtime Claim |
|---|---|
| Trimming with the STA1600 attachment | |
| Edging with the EA0820 attachment on low | Up to 75 minutes |
| Edging at full speed, heavy growth | Materially shorter than the low-speed figure |
| Battery platform | 56V ARC Lithium |
| Attachments confirmed in the kit | PH1420 power head, STA1600 trimmer, EA0820 edger |
| Standalone 8-inch edger blade pricing |
Those two runtime numbers tell the real story. Edging on low draws less than trimming at working speed, which is why the same battery stretches further — run the edger at full throttle through thick bermuda and you’ll land far closer to the trimmer figure than the 75-minute one. A second battery, or a larger pack, is the honest answer for anything past a quarter acre.
If you’re weighing specific models against your yard size, a side-by-side look at tested battery powered edger trimmer units will save you a return trip to the store.
Compatibility And Battery Caveats
Batteries are brand-locked. EGO’s system works with all EGO POWER+ 56V ARC Lithium batteries and compatible EGO attachments, while the Genesis GLGST20B manual specifies only its GLAB2020B or GLAB2040B packs. Cross-brand swaps aren’t supported.
Before buying, check three things: the battery platform the kit ships on, whether a bare tool option exists if you own that platform, and how many attachments the power head accepts. EGO notes a single 5.0Ah battery fits its edger, trimmer, blower, and other 56V tools — useful if you’re building a yard-care lineup on one charger. The EGO POWER+ multi-head combo kit page lists the exact included components and compatibility, which is where to confirm any bundle you’re considering.
FAQs
Do I need a different battery for edging versus trimming?
No. On a combo system the same pack drives both functions. Edging simply draws differently depending on speed and load, so your runtime shifts with the task rather than the battery. If you edge and trim in one session, expect total time closer to the trimmer figure than the edger-only one.
Can I use any brand’s battery in these tools?
No. Battery platforms are proprietary. EGO tools run on EGO POWER+ 56V ARC Lithium packs, and the Genesis GLGST20B manual names only its GLAB2020B and GLAB2040B batteries. Mixing brands isn’t supported and can damage the tool or void coverage.
Is a multi-head system better than a rotating-head trimmer?
They solve different problems. A rotating-head unit converts in seconds and costs less, which suits a single yard. A multi-head system spreads one battery and power head across several attachments, so it pays off if you want edging, trimming, and other tools from a shared platform.
References & Sources
- EGO Power+. “Multi-Head Edger & String Trimmer Combo” Lists included components, attachments, and 56V ARC Lithium compatibility.
- EGO Power+. “Multi-Head String Trimmer & Edger Combo Kit MHC1603” Source of the STA1600 and EA0820 runtime claims.
- EGO Tools USA. “Edger” Describes 56V battery support and standalone blade pricing.
- Genesis. “GLGST20B 20V String Trimmer/Edger Operator’s Manual” Documents the 90° head rotation procedure and battery compatibility.