Greenworks LM2108S SKU 2552102 / MO80L810 21-inch 80V self-propelled mower with 8.0Ah battery and 6A charger review

The Greenworks LM2108S name appears on several battery packages. This assessment is for U.S. SKU 2552102 / internal model MO80L810: a 21-inch self-propelled 80V mower with one 8.0Ah battery and a 6A charger. It is not SKU 2550402's 4.0Ah kit or the separate LM2108SA1 bundle with 4Ah and 2Ah packs plus a 2A charger. Check the SKU and internal code on the exact listing; the shared model name does not identify the carton contents.

What the 8Ah package actually changes

The mower is a residential 21-inch steel-deck model with a brushless motor, variable-speed rear-wheel self-propel, LED headlights, and a single-lever seven-position height adjustment. Greenworks lists a 1.38-to-4-inch cutting range and a 60-liter grass bag. The box list names the mower, one 80V 8.0Ah pack, charger, catcher and manual. The useful package difference is a single larger-capacity pack, not a second battery or wider deck. Greenworks identifies the charger as 6A, but gives no charger model or wattage on this page.

The maker claims up to 80 minutes of runtime, up to three-quarters of an acre, and an 80-minute recharge with the included pack and charger. The page itself notes that grass condition and operator technique change runtime. These are maximum claims, not a promise that a particular three-quarter-acre yard will finish on one charge. Long or dense growth, frequent bagging, slopes and powered drive can all increase demand. If your routine regularly pushes the mower near the acreage limit, keep charging time and a second compatible pack in your plan.

Clipping options and the manual mismatch

The product page promotes “4-in-1” use: mulch, bag, side-discharge and Turbo leaf pickup. The exact page links a 56-page Greenworks operator manual, but its cover identifies MO80L416 / LMB412 rather than MO80L810. That mismatch is worth noting instead of treating the PDF as an exact-code kit manual. It describes mulching, rear bagging and side discharge as clipping arrangements and Turbo as a temporary blade-speed increase, not a separate discharge route or leaf-vacuum attachment. The product page independently supports the three clipping routes. Count those three modes; do not treat Turbo as a fourth attachment.

There is one battery in this package. The linked manual's different code is not enough to establish whether MO80L810 has a second active battery port or on-board storage bay. Confirm the exact configuration with Greenworks if port count or spare-pack storage is essential. The 8Ah rating cannot be treated as two packs, nor does it provide a charged reserve in the box.

Who should compare this kit?

It is a reasonable shortlist candidate for a homeowner who wants self-propelled walking operation, a 21-inch cut path, bagging, and a substantial single 80V pack included. The larger pack may make this a more useful starting kit than SKU 2550402 if you do not already own a compatible Greenworks battery and the higher runtime claim matters. Greenworks has separate battery voltage families and exceptions; verify compatibility with your exact tools instead of assuming every Greenworks pack fits every Greenworks tool.

If your lawn is small or you already have compatible 80V batteries, compare the less-capacious SKU 2550402 before paying for extra included capacity you may not use. If your property is larger or routinely difficult, a 21-inch walk mower may be the wrong format regardless of the nominal battery capacity; consider a wider-deck or riding option only after checking access and storage. The deck width is not the full machine width, so measure narrow gates. The product page's 89.1-pound weight field does not say whether the battery is included; it is not a dependable mower-only lifting figure.

Limits, ownership and alternatives

Greenworks lists a four-year limited tool warranty and four-year battery warranty for this package. Its manual linked from the exact product page gives useful family-level operating and care instructions, but the different cover code means buyers should verify the manual supplied with MO80L810. That manual warns against wet mowing and slopes over 15 degrees; follow the instructions delivered with the unit rather than assuming a family document overrides them. The product page does not give this SKU a weather-resistance rating. Remove the battery before cleaning, adjustment or blade service, and store the pack according to Greenworks' instructions.

Choose another setup if you require two batteries in the exact box, a verified dual-port arrangement, confirmed high-lift blade inclusion, a known transport weight, or documented use on steep ground. Those details are not established for SKU 2552102 by its contents list and linked manual. Compare SKU 2550402 for a one-pack 4Ah kit. Compare LM2108SA1 only if its distinct 4Ah/2Ah combination suits you: that package's own manual says the right compartment is storage, but this does not prove the MO80L810 layout. The purchase decision should turn on the exact battery and charger in the carton, whether the conditional runtime claim suits your lawn, and whether you can get the right manual for your internal model code.

Manufacturer evidence: Greenworks LM2108S SKU 2552102 / MO80L810 product page; the page links the P0805346-00 operator manual, whose cover code is MO80L416 / LMB412. Greenworks' recall register was checked for the exact codes on 2026-10-24; a list check is not a blanket safety guarantee.