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The short answer: If your lawn is under half an acre and you want a lighter, more maneuverable mower, the EGO LM2135SP is a solid, budget-friendly choice. For larger lawns (over half an acre) and if you want faster cutting with a wider deck and a more powerful motor, the EGO LM2156SP is worth the extra investment. Both are reliable cordless mowers, but their differences in cutting width, power, and battery system can sway your decision.
Before diving into details, here’s a quick comparison table based on manufacturer specs and user reviews:
These differences affect performance, especially on slopes and in thick grass.
The LM2135SP is equipped with a 7.5 ft-lb motor, which is adequate for typical residential lawns. It handles most grass conditions well, but on thick, damp grass, you might need to slow down or overlap your passes. The LM2156SP, on the other hand, offers a variable-speed motor that can deliver up to 10 ft-lbs of torque. This extra power allows it to cut through tough grass more easily, and the variable speed lets you adjust the blade speed to match the conditions, reducing clumping and improving bagging.
Another practical difference: the LM2156SP has a brushless motor with more efficient electronics, which can extend runtime. Some users report that the LM2156SP runs longer on a single charge compared to the LM2135SP, even with the same battery, because of its variable speed control (you can slow it down when you don’t need full power).
The LM2135SP comes with a 5.0Ah battery and a standard charger. It uses the older ARC battery platform, which is still widely available and works with many EGO tools, but it does not accept the newer high-capacity batteries (like 7.5Ah, 10Ah, 12Ah) unless you use an adapter (not included). This limits your ability to buy a larger battery later for extended runtime.
The LM2156SP ships with a 6.0Ah battery (in some bundles) or as a tool-only option, and it is fully compatible with all ARC batteries, including the high-capacity ones. If you already own EGO tools with the 56V ARC system, the LM2156SP is more future-proof. Also, the LM2156SP’s charger is faster (dual port in some kits), but you can use any EGO charger.
In real-world usage, the LM2135SP gives about 30-40 minutes of runtime on a 5Ah battery, depending on grass height and speed. The LM2156SP with a 6Ah battery can last 45-60 minutes, especially if you use the variable speed to lower the blade speed on lighter cuts.
Both mowers have rear-wheel drive, which is great for pushing uphill because the weight is over the drive wheels. But the LM2135SP has a fixed speed self-propelled mechanism. You just squeeze the bar and it moves at a constant pace. This can be frustrating if you have a slope that requires a slower or faster pace, or if you have a long, flat stretch where you want to go faster.
The LM2156SP offers a variable speed dial (from 0.9 mph to 3.1 mph) that you can adjust on the fly. This gives you precise control, which is especially helpful on hills or when maneuvering around flower beds. The LM2156SP also has a larger rear wheel (10 inches vs 8 inches on the LM2135SP), providing better traction and stability.
The cutting decks are similar in construction (steel and composite), but the LM2156SP has a wider deck (22 inches vs 21 inches), which means fewer passes across your lawn. Both support side discharge, mulching (with a plug), and rear bagging. The LM2156SP’s bag has a capacity of 2.9 bushels, slightly larger than the LM2135SP’s 2.5 bushels. That means fewer trips to the compost pile.
One notable feature on the LM2156SP is the “touch drive” control, which is more responsive. Also, the LM2156SP has a folding handle that does not require any tools, while the LM2135SP has a two-step fold that is also tool-free but a bit less compact.
Based on research and user reviews, the LM2156SP tends to have better bagging performance, especially in wet grass, because of the higher blade speed and better airflow design. The LM2135SP is fine for dry, mowed weekly grass.
Typically, the LM2135SP is priced in the budget to mid-range segment (with battery and charger), while the LM2156SP is in the mid-range to premium segment (with battery and charger). The LM2156SP can also be bought as a tool only, which is great if you already have EGO batteries.
The price difference is significant. You get extra power, a wider deck, variable speed, and better battery compatibility. If you have a lawn over a quarter acre, the time savings alone can justify the cost. Also, the LM2156SP is more likely to be a ‘last mower you’ll buy’ because of its versatility.
If you have a small, flat yard and are on a tight budget, the LM2135SP is a great value. But if you want the best performance and plan to keep the mower for years, the LM2156SP is the better investment. If you’re still unsure, check out our best lawn mowers guide for more options at different price points.
Yes, both use EGO’s 56V ARC battery, but the LM2135SP is not compatible with the larger batteries (like 10Ah or 12Ah) without an adapter. The LM2156SP works with all ARC batteries. So if you plan to buy a high-capacity battery, the LM2156SP is more flexible.
Yes, both are rear-wheel drive, which provides good traction on slopes. However, the LM2156SP’s variable speed lets you adjust your walking pace, making it easier to control on steep hills. The LM2135SP’s fixed speed might be too fast for very steep sections.
The LM2135SP is lighter and has a slightly more compact fold, making it easier to hang on a wall or fit in a small shed. The LM2156SP is bulkier but still folds, though its heavier weight can be a factor if you need to lift it often.
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Honesty note: We have not hands-on tested every product mentioned on this page. Where we have not personally used a product, any ranking referenced here is based on verified specs, aggregated owner feedback, availability and editorial comparison rather than a hands-on review.