Product Review: LawnMaster CLMF4821A Cordless Lawn Mower Brushless 48V MAX* 21Inch 3-in-1 Function Up to 1/2 Acre with 4X24V MAX* 4.0Ah Battery and a Dual Charger
Introduction
Looking for a reliable cordless lawn mower that can handle a small yard without the noise, smell, or maintenance of a gas engine? The LawnMaster CLMF4821A arrives as a compelling option: a brushless lawn mower with a 21 inch lawn mower deck, powered by a 48V battery system and sold as a full kit with four 24V batteries and a dual charger. This review covers performance, features, pros and cons, and whether you should buy LawnMaster CLMF4821A for your lawn care needs.
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What is this product?
Overview
The LawnMaster CLMF4821A is a 48V lawn mower system that ships as a mower kit with 4x24V 4.0Ah batteries and dual charger included. It’s a 3-in-1 lawn mower offering bagging, mulching, and side discharge, designed to cut up to a half acre on a single charge cycle when managed efficiently. If you’re looking to buy 21 inch battery mower online or search for LawnMaster CLMF4821A for sale, this model promises the convenience of a battery powered lawn mower with the torque and runtime to tackle small yards.
Key Features
- POWERFUL PERFORMANCE: Tackle your yard with up to 3400 RPM of power and no gas or oil to maintain.
- CORDLESS FREEDOM: Powered by two 24V MAX* 4.0Ah lithium-ion batteries at a time, with an additional two batteries included — delivering up to 48 minutes of runtime while the bag collects 15 gallons of clippings.
- iPOWER TECHNOLOGY DISPLAY: Intelligent power management with a display that indicates cutting mode and battery level for efficient operation.
- 3-IN-1 FUNCTION: Options for bagging, side discharge, or mulching for versatile yard work.
- CUSTOMIZE YOUR CUT: 6 cutting positions from 1.4 inches to 3.4 inches to suit different grass heights and seasons.
Detailed Description
This electric push mower uses a brushless motor that improves efficiency and longevity compared to brushed designs. The dual-battery arrangement makes the LawnMaster CLMF4821A a true dual battery mower, supporting longer runtime and stable power delivery — useful for a 48V 21 inch brushless cordless mower for up to half acre with 3-in-1 function. The included four 24V MAX* 4.0Ah batteries and the dual charger allow you to charge a pair while running the others, maximizing productivity during mowing sessions.
Operation is quiet and low-vibration, making it well-suited as a quiet long runtime battery mower for small yards. The deck size (21 inch) strikes a balance between maneuverability and coverage, making it ideal for a compact lithium battery mower ideal for 0.5 acre. You’ll appreciate the iPOWER display for monitoring battery life and selecting mulching, bagging, or side discharge modes on the fly.
Use Cases
- Homeowners with up to 0.5 acre who want a reliable battery mower for half acre.
- Those wanting to purchase 3-in-1 electric lawn mower capabilities without dealing with gas engines.
- Users seeking a compatible 24V battery pack mower setup for flexible charging and storage.
Pros and Cons
Pros
- Low maintenance — no gas, oil, or spark plugs.
- Brushless motor for improved efficiency and longevity.
- Comes with four batteries and a dual charger — excellent value for runtime.
- 3-in-1 function: mulching, bagging (15-gallon bag), and side discharge.
- Quiet operation and good maneuverability for a 21 inch lawn mower.
Cons
- Runtime depends on grass conditions; heavy or tall lawns may reduce the advertised 48 minutes.
- Slightly heavier than single-battery mowers due to the multi-battery kit.
- Replacement batteries add to long-term cost if you need extra runtime beyond included packs.
Who Should Buy This Product
If you want to buy LawnMaster CLMF4821A because you need a dependable, low-maintenance cordless lawn mower that covers up to a half-acre, this model is an excellent choice. It’s especially well-suited for:
- Owners of small to medium lawns (up to 0.5 acre) who need a quiet, battery powered lawn mower.
- Buyers looking for a cordless mower with battery and dual charger included — a turn-key solution.
- Anyone who prioritizes brushless lawn mower efficiency and wants the flexibility of bagging, mulching, or discharge.
Comparison with Similar Products
Compared to single-battery 40V mowers, the LawnMaster CLMF4821A’s dual 24V configuration (48V MAX*) gives better sustained power and runtime when using multiple batteries. Versus gas push mowers, it’s quieter and requires far less maintenance. Against higher-end 60V or rear-wheel-drive mowers, it’s more budget-friendly and comes as a full kit, though extreme terrains or larger lots might benefit from higher-voltage alternatives.
Frequently Asked Questions
Can this mower really handle half an acre?
Yes — under normal grass conditions and with efficient battery management, the advertised 48 minutes of runtime can cover up to 0.5 acre. Heavy or tall grass will reduce coverage, so charging strategy matters.
Are the batteries included compatible with other LawnMaster tools?
The mower uses 24V MAX* battery packs. Check LawnMaster compatibility charts for cross-tool use. The package includes mower kit with 4x24V 4.0Ah batteries and dual charger included, which provides flexibility for charging and usage cycles.
Final Verdict
The LawnMaster CLMF4821A is a strong contender if you want a practical, no-fuss cordless lawn mower with the benefits of a brushless lawn mower, a 21 inch lawn mower deck, and a full battery package. It’s ideal for homeowners who need a quiet long runtime battery mower for small yards and prefer a 3-in-1 lawn mower for seasonal versatility. If your priority is to buy 21 inch battery mower online or find 48V mower deals, this kit delivers excellent value thanks to the included batteries and dual charger.