Sun Joe MJ401C 14-Inch Cordless Lawn Mower
The Sun Joe MJ401C combines cordless convenience with reliable cutting performance for compact yards and urban lawns. Powered by a 28-volt rechargeable lithium-ion battery, this 14-inch walk-behind mower eliminates extension cords and gas refills while delivering consistent power from edge to edge.
We designed the MJ401C for homeowners who need a lightweight, easy-to-maneuver solution without sacrificing cut quality. The 10.6-gallon rear collection bag handles grass clippings efficiently, while the 3-position height adjustment lets you dial in the perfect cut from 1.18 inches to 2.52 inches. At just 33 pounds, it stores vertically in tight garage spaces and starts with a simple push-button ignition.
MJ401C specifications at a glance
Battery Performance & Runtime
The 28-volt lithium-ion battery delivers approximately 22 minutes of continuous mowing per charge under typical conditions. That runtime covers roughly 2,800 to 3,200 square feet of grass, making the sun joe mj401c ideal for urban lots and suburban front yards where extension-cord reach would otherwise limit your path.
We include both the battery and a 120-volt wall charger in every box. A full recharge takes about 90 minutes from empty, so you can mow in the morning, recharge over lunch, and finish a second pass in the afternoon if needed. The battery uses standard lithium-ion cells with built-in overcharge protection and temperature monitoring to extend cycle life beyond 300 full charges.
Cutting Width & Height Adjustment
The 14-inch steel deck strikes a balance between maneuverability and productivity. You’ll navigate narrow side yards and tight corners more easily than with a 20-inch model, yet still finish a quarter-acre lot in under 30 minutes with overlapping passes.
Three height positions let you customize cut length: 1.18 inches for a golf-course look, 1.77 inches for standard residential turf, or 2.52 inches when managing taller spring growth. Adjustment happens via a single lever mounted on each rear wheel — no tools required. The deck sits low enough to scalp uneven ground if you’re not careful, so we recommend the middle setting for most yard profiles.
Bagging System & Grass Discharge
Rear Bag Capacity
The 10.6-gallon hard-top bag attaches to the mower’s rear discharge chute with a spring-loaded latch. Collection efficiency hovers around 85 percent in dry conditions — fine clippings occasionally escape the bag’s mesh sides, but heavy wet grass clumps stay contained. You’ll empty the bag two to three times on a typical 3,000-square-foot lawn.
Bag Removal & Cleaning
A single-hand release button lets you detach the bag without bending over or wrestling with clips. The bag’s rigid plastic frame holds its shape when full, so it won’t collapse mid-mow and block airflow. After use, hose out the interior and let it air-dry upside down to prevent mildew between cuts.
Cordless & Electric Mowers from Sun Joe
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Common Questions About the MJ401C
The 28-volt lithium-ion battery provides approximately 22 minutes of continuous runtime under typical mowing conditions. That covers roughly 2,800 to 3,200 square feet of grass depending on terrain, grass height, and your walking speed.
If you have a larger yard, you can purchase a second battery to swap in and extend your range, or plan a midday recharge break between front and back sections.
You can mow damp grass with the sun joe mj401c, but we recommend waiting until morning dew evaporates for best results. Wet clippings clump together and clog the bag more quickly, reducing collection efficiency and requiring frequent stops to clear the chute.
The battery and motor are splash-resistant but not waterproof, so avoid mowing during active rain or through standing puddles.
The MJ401C features a 14-inch steel cutting deck with three height positions: 1.18 inches, 1.77 inches, and 2.52 inches. You adjust the height using levers mounted on each rear wheel — no tools required.
The 14-inch width is narrower than standard gas mowers, making this model ideal for tight spaces, narrow gates, and urban lots with landscaping obstacles.
A completely depleted battery recharges to 100 percent in approximately 90 minutes using the included 120-volt AC wall charger. The charger has an LED indicator that glows red during charging and switches to green when the cycle completes.
You can leave the battery on the charger after it reaches full capacity without damaging the cells — built-in overcharge protection prevents heat buildup and extends overall battery lifespan.
The mower weighs 33 pounds fully assembled with the battery installed. Most users find it light enough to lift with one hand for curb loading or stair navigation. The rear-wheel-drive design is self-propelled by your forward motion, not a motor, so you provide all the pushing force.
On flat terrain the mower rolls easily. Steep slopes or thick overgrowth require more effort, but the light weight still makes it easier to control than a 60-pound gas model.
The 10.6-gallon grass bag locks onto the rear discharge chute with a spring-loaded latch mechanism. We've tested it on uneven ground and sharp turns without accidental detachment. The latch releases with a single-hand button press when you're ready to empty clippings.
The bag's rigid plastic frame prevents sagging when full, so airflow stays consistent and the bag won't drag on the ground mid-mow.
Yes — the handle folds down in two places, reducing the mower's height from 38 inches to 12 inches when collapsed. In this compact profile you can hang it on a wall hook, slide it under a workbench, or stand it vertically in a corner.
The folding process uses quick-release collar clamps, so no screws or wing nuts come loose during storage. Total fold time is about 15 seconds each way.