21 Inch Electric Lawn Mower, 2×20V Brushless Mower with 8-Position Height Adjustment, Cordless Push Lawn Mower, 2×8.0Ah Batteries & Dual Charger Included Review

Overview

The Height 21-Inch Electric Lawn Mower aims to bridge the gap between budget-friendly cordless mowers and premium models, offering a twin-battery system and brushless motor at a compelling $299.99 price point. Designed for homeowners with small to medium lawns (up to about 1/3 acre), this mower targets those ready to ditch gas, oil changes, and pull cords—without breaking the bank. It’s best suited for flat, well-maintained yards rather than thick, overgrown grass or steep hills.

Who Should Buy This

• Homeowners with 1/4 to 1/3 acre lawns – The dual 8.0Ah batteries provide enough runtime for most suburban lots (expect 45–60 minutes of actual mowing), making this a solid fit for standard rectangular yards.
• First-time cordless mower buyers – At under $300 with two batteries and a charger included, this is a low-risk entry point for anyone tired of gas but unsure about investing in pricier brands like EGO or Greenworks.
• Eco-conscious homeowners who hate gas cans – No fumes, no spilled fuel, no trips to the station. The brushless motor is also quieter than gas, so you can mow early without waking the neighbors.
• DIYers who want simple maintenance – No oil changes, spark plugs, or air filters. Just charge, mow, and occasionally clean the deck.

Key Features Breakdown

2×20V 8.0Ah Batteries & Dual Charger – This is the headline feature. Two 8.0Ah batteries (160Wh total) give you decent runtime, but note that these are not the same as 40V or 56V systems. The voltage is 20V, meaning less torque than higher-voltage competitors. The dual charger tops both batteries simultaneously in about 2 hours—a real convenience.

21-Inch Steel Cutting Deck – A 21-inch deck is the sweet spot for most residential lawns: wide enough to cut efficiently, narrow enough to maneuver around flower beds and fences. The steel construction adds durability over plastic decks, though it does make the mower heavier (around 45 lbs with batteries).

Brushless Motor – Brushless motors are more efficient and longer-lasting than brushed motors. This one delivers adequate power for typical grass, but may bog down in thick St. Augustine or wet grass. It’s not a mulching monster, but it handles regular weekly cuts fine.

8-Position Height Adjustment – A single lever adjusts cutting height from 1.5 to 3.5 inches. This is genuinely useful: you can go low for a clean spring cut, or raise it in summer to avoid scalping. The range is good, but the increments aren’t as precise as some premium models with 10+ positions.

3-in-1 Function (Mulch, Side Discharge, Rear Bag) – The included 1.5-bushel bag is smallish (expect frequent empties on larger lawns), but the mulching plug and side discharge chute are easy to swap. Mulching performance is average—fine for dry grass, but clumps can form in damp conditions.

Foldable Handle – The handle collapses for vertical storage, saving garage space. It’s a nice touch, though the locking mechanism feels a bit plasticky.

Pros

1. Great value for the battery package – Two 8.0Ah batteries and a dual charger for $300 is rare. Most competitors sell bare tools at this price.
2. Brushless motor efficiency – Longer battery life and less wear than brushed motors. You’ll get more cuts per charge over the mower’s lifetime.
3. Single-lever height adjustment – Quick and tool-free. You can change cutting height in seconds, which is more convenient than adjusting each wheel individually.
4. Quiet operation – At about 80 dB, it’s noticeably quieter than gas mowers. You can hold a conversation while mowing.
5. Lightweight and easy to push – At ~45 lbs, it’s manageable for most users. Self-propelled would be better for hills, but for flat yards, this is fine.
6. Dual charger saves time – Charge both batteries simultaneously, so you’re never waiting more than 2 hours for a full set.

Cons

1. Underpowered for thick or tall grass – The 20V system struggles with overgrown lawns. If you let the grass get too long, you’ll hear the motor bog down and may need to take smaller passes.
2. Small bag capacity – The 1.5-bushel bag fills quickly. On a 1/3-acre lawn, expect to empty it 3–4 times. This slows down mowing.
3. Mediocre mulching performance – In damp grass, clumps will form. You’ll need to mow dry and at a higher setting for decent mulching.
4. Plastic handle and components – The folding handle uses plastic joints that feel less durable than all-metal designs. Over time, these could loosen or crack.

Bottom Line

The Height 21-Inch Electric Lawn Mower is a solid budget-friendly option for homeowners with small, flat lawns who want to go cordless without spending $500+. The dual 8.0Ah batteries and brushless motor offer good runtime and efficiency for the price, but the mower’s 20V system lacks the torque of higher-voltage competitors—so don’t expect it to handle thick, neglected grass or steep slopes. If you mow weekly, keep your grass at a moderate height, and value simplicity over raw power, this is a smart buy. For larger yards or tougher conditions, save up for a 40V or 56V model. At $299.99, it’s a fair deal for the right buyer.

Frequently Asked Questions

Q: How long do the batteries really last? A: Real-world runtime is about 45–60 minutes of continuous mowing with both batteries. That translates to roughly 1/4 to 1/3 acre, depending on grass thickness and speed. Expect less if you’re mulching or cutting tall grass.

Q: Can I use other 20V batteries with this mower? A: No. Height uses a proprietary battery interface. Only Height-branded 20V batteries (sold separately) will work. The included 8.0Ah batteries are the largest they offer.

Q: Does this mower handle hills well? A: It can handle gentle slopes, but it’s not self-propelled. On steep hills, you’ll need to push harder, and the motor may slow down. It’s best for flat or slightly sloped yards.