Worx Lawn Mower Battery Guide: Comparing Runtime, Power, and Fit

Best for: Homeowners needing official Worx replacement batteries

Pros

• Thermoplastic cell cooling
• 360-degree impact protection
• Built-in charge level indicator

Cons

• Standard 4.0Ah capacity

The WORX 20V 4.0Ah Lithium-ion Battery 2 package, carrying model number WA3674.J2, delivers genuine factory-grade power engineered specifically for high-demand outdoor power equipment and everyday workshop tools. Built as part of the PowerShare Pro generation, these two lithium-ion modules provide twice the operating runtime of entry-level 2.0 Ah packs. This extended capacity makes the set an ideal solution for property owners who already own a compatible Worx mower and need additional reserves to tackle thicker turf without mid-mow interruptions. Backed by a 3-year manufacturer warranty, this pair represents the foundational power source for the entire brand ecosystem.

Thermal stability and structural defense are central to the internal construction of the WORX 20V 4.0Ah Lithium-ion Battery 2. Worx incorporates advanced thermoplastic cooling materials that wrap the lithium-ion cells to dissipate internal heat under heavy mowing loads, preventing thermal throttling. Additionally, full 360-degree cell protection safeguards internal connections against the constant ground vibrations and occasional frame impacts inherent to push mowing. An intelligent battery management system actively regulates individual cells to optimize amperage delivery, while an integrated push-button release and onboard charge-level indicator allow you to verify power levels before heading out to the yard. The set is compatible with a wide suite of chargers, including WA3742, WA3769, WA3881, WA3770, WA3884, and WA3835.

This dual-pack suits homeowners who prioritize factory build quality, full warranty coverage, and guaranteed compatibility across all standard 20V and 40V Worx outdoor power equipment. If your current mower runs on paired packs that are losing stamina after years of seasonal duty, choosing this authentic worx powershare battery for lawn mower service provides refreshed runtime without risking tool electronics. While it offers standard 4.0 Ah capacity rather than higher-density third-party ratings, its rugged shock protection and thermal dissipation make it exceptionally reliable for regular family yard maintenance.

Best for: Extended runtime across non-Nitro tools

Pros

• High 6.5Ah capacity
• Three-light LED level display
• Up to 1,000 charge cycles

Cons

• Not compatible with Nitro series

For yard care enthusiasts seeking substantial runtime without swapping packs midway through the job, the 2-Pack 6.5Ah Battery Compatible with WORX provides an ultra-high-capacity alternative to factory spares. Manufactured by Bakipante under part number WA3578, this dual pack features an impressive 6500 mAh capacity rating per unit at 20 volts. This capacity delivers roughly three times the operating endurance of a standard 2.0 Ah pack, allowing you to complete extensive edging, trimming, and mowing tasks on a single charge cycle. The modules utilize premium lithium-ion cells designed to sustain up to 1,000 charging cycles without suffering from performance-draining memory effect.

Safety and comprehensive monitoring are integrated directly into the housing of this high-capacity worx lawn mower battery replacement pair. Certified under CE, FCC, and RoHS standards, each unit features internal circuitry that protects against incorrect operational voltage, overcharging, excessive battery discharge, over-current spikes, and unexpected short-circuiting. At a manageable weight of just 1.1 pounds per battery, the packs slide into standard Worx battery ports with ease. A three-light LED indicator allows you to check remaining charge at a glance, making it simple to gauge whether you have sufficient power to finish the remaining grass strips. Just as you might monitor a battery tender for lawn mower storage during the off-season, keeping tabs on LED status lights helps preserve cell life over multiple seasons.

This replacement pack suits budget-conscious families managing larger lots who require maximum possible ampere-hours to power through dense turf without frequent stops at the wall outlet. It is directly compatible with standard Worx 20V and dual-battery 40V tools, accepting chargers such as the WA3875, WA3742, and WA3881. However, the manufacturer specifically notes that these replacement batteries are not compatible with Worx Nitro 20V or 40V models, making them best reserved for standard PowerShare equipment.

Best for: Noise-sensitive neighborhoods and compact storage

Pros

• Quiet 87.8-decibel sound level
• Fully collapsible handle design
• Dual 4.0Ah batteries and charger included

Cons

• Smaller 0.85-bushel grass bag

Best for: Small yards with dense seasonal grass

Pros

• Brushless motor with IntelliCut torque
• Low 0.8-inch minimum cutting height
• Cut-to-edge slim deck design

Cons

• Covers up to 1/8 acre only

Best for: Compact lawns needing ultra-light maneuverability

Pros

• Extremely lightweight at 21.7 pounds
• Included 5.0Ah PowerShare Pro battery
• Single-lever six-position height adjustment

Cons

• Narrow 13-inch cutting width

Best for: Quarter-acre suburban yards needing power

Pros

• Brushless 2.0 motor technology
• Wide 16-inch cutting width
• Dual charger included in box

Cons

• Heaviest mower at 39.7 pounds

The Worx Cordless Lawn Mower (model WG745) is a capable 40V walk-behind machine designed to manage suburban yards up to one-quarter acre on a single charge. Powered by two included 20V 4.0Ah PowerShare batteries, this machine operates on a combined 40V circuit that delivers the muscle required for thick turf without the fumes, pull cords, or routine spark plug maintenance of gas alternatives. The mower includes a matched dual charger right in the box, allowing both power packs to recharge simultaneously so the machine is ready whenever the weekend schedule permits.

Cutting performance is driven by a high-efficiency Brushless Motor 2.0, which generates 40 percent higher cutting power, 10 percent longer run time, and ten times the operational lifespan of first-generation brushless hardware. Paired with a 17-inch deck that provides an active 16-inch cutting width, the mower incorporates patented Intellicut technology. This smart sensor system monitors blade resistance and automatically boosts cutting speed when encountering tall, dense grass, then throttles back during lighter patches to preserve valuable battery energy. The deck also features a cut-to-edge design that trims close to garden borders, fences, and decorative retaining walls, while offering 2-in-1 adaptability between fine mulching and rear-bag grass collection.

This mower suits active families with midsize residential properties who want an agile machine that minimizes clean-up time. Fully assembled at 39.7 pounds, it remains easy to push around landscaping obstacles and lift over patio curbs. An onboard battery charge indicator keeps you informed of energy levels during operation. When matched against smaller 14-inch alternatives, the WG745 offers wider coverage per pass and stronger motor torque, making it the primary pick for yards approaching a full quarter-acre.

The Worx Cordless Lawn Mower (model WG733.1) takes compact agility to the extreme, weighing in at an ultra-light 21.7 pounds. Engineered specifically for urban lots, patio yards, and small green spaces up to 3,200 square feet, this nimble machine operates on a streamlined 20V platform. It comes packed with a single high-capacity 20V 5.0Ah PowerShare Pro battery, supplying concentrated power to an efficient brushless motor that maximizes energy transfer while maintaining low working temperatures throughout operation.

Despite its featherweight frame, the mower provides versatile cutting options, featuring 2-in-1 functionality that lets you quickly alternate between rear bagging and nutrient-rich mulching. It sports a 14-inch deck with a 13-inch cutting path, ideal for navigating narrow paths, dog runs, and tightly landscaped yard perimeters. A single-lever adjustment mechanism controls all four wheels simultaneously, giving you six cutting height positions ranging from 1 inch to 3 inches. A dedicated cut-to-edge housing profile pulls grass blades flush along wall lines to reduce subsequent string trimmer chores, while a 1-bushel collection bag minimizes emptying stops.

Homeowners who find heavy walk-behind machines difficult to maneuver or carry down basement stairs will appreciate the featherlight handling of this model. It fits compact storage sheds and car trunks with ease. While it covers less surface area per pass than 40V dual-battery machines, the included 5.0Ah PowerShare Pro pack delivers exceptional endurance for modest lawns and integrates seamlessly with other 20V tools in the household collection.

The WORX Cordless Lawn Mower (model WG735) bridges the gap between compact maneuverability and advanced cutting intelligence. Designed for properties up to one-eighth of an acre, this 40V walk-behind mower utilizes an advanced brushless motor paired with proprietary IntelliCut technology. The intelligent sensing system actively measures cutting load, automatically increasing torque output when encountering thick or damp grass patches and scaling back power on manicured turf to stretch overall battery runtime.

Built with a 14-inch deck that cuts a full 14-inch swath, the WG735 weighs an easy-to-manage 27.7 pounds. It features an optimized deck with enhanced internal airflow that channels clippings smoothly into a large 1-bushel grass collection bag, promoting cleaner pickup and reducing turf clumps. The mower also supports 2-in-1 bagging and mulching configurations. A single-lever height adjustment changes deck elevation across six positions, spanning from a low 0.8 inches up to 3 inches. This broad height range allows families to adjust for seasonal grass growth, while the cut-to-edge deck geometry trims tightly around perimeter fencing.

This model is an excellent match for homeowners with manicured, moderately sized yards who face fluctuating grass conditions such as rapid spring growth or dense shade patches. While it does not deliver the wider swath of the 17-inch WG745, its responsive motor torque, 0.8-inch low-cut capability, and modest physical footprint make it easy to push across tight turf sections and store upright in cramped garages.

The WORX Cordless Lawn Mower, carrying part number WG779, focuses on serene, low-impact yard maintenance tailored for dense residential neighborhoods. Operating at a sound level of just 87.8 decibels, this 40V mower eliminates the harsh roar of small gas engines, allowing you to mow early on weekend mornings without disturbing neighbors or straining your own hearing. The system draws juice from two included 20V 4.0Ah PowerShare batteries, supported by an included dual-battery charger that restores both packs at the same time.

Starting the WG779 is effortless thanks to a push-button ignition and bail handle engagement. Built with a 14-inch deck, the machine weighs 29.1 pounds, keeping it under the 30-pound threshold for easy slope handling and smooth portability. Patented Intellicut sensor technology automatically throttles blade speed up in tall turf and down in light grass, conserving battery power across yards up to one-eighth of an acre. The mower includes a 2-in-1 cutting system with a mulch plug and a 0.85-bushel collection bag equipped with a mechanical full-bag indicator. Cutting heights adjust via a single lever from 1.5 inches to 3.5 inches, while an onboard charge indicator keeps battery health visible. Those considering powerful walk-behinds often compare such setups against larger platforms like a greenworks lawn mower 80v self propelled unit, yet the lightweight frame of the WG779 delivers simpler handling for compact suburban spaces.

This mower is ideal for townhome owners and noise-conscious suburban families seeking a dependable, easy-to-store lawn maintenance tool. The fully collapsible handle assembly folds flat over the deck for upright closet storage, and a molded top carry handle ensures balanced lifting. Backed by a 3-year limited lifetime warranty, the WG779 offers reliable everyday utility for properties where quiet operation and tidy storage matter most.