A dying or underperforming battery can leave your Husqvarna lawn mower powerless at the worst possible moment—mid-mowing or during chilly spring mornings.
Many owners face frustrating recurring issues like sluggish starts, poor longevity from low-quality replacements, or purchasing a battery that simply doesn’t properly fit or align with their mower’s electrical requirements.
Reliable performance starts with choosing the correct battery built to meet your mower’s exact power and compatibility needs.
We evaluated technical specifications, warranty terms, and over 70 user reviews to pinpoint the top batteries that deliver strong Cold Cranking Amps (CCA), correct group size, and accurate polarity for seamless installation.
Whether you own a riding mower or a walk-behind model, our top-rated selections include the best AGM lawn mower batteries and rechargeable options to keep your Husqvarna running strong season after season.
1. Mighty Max ML-U1R-CCAHR 12V Battery
This beast of a battery delivers serious starting power, making it a top-tier choice for users who demand reliability in heavy-duty Husqvarna riding mowers.
With 320 Cold Cranking Amps (CCA) and a robust 12V sealed lead-acid (SLA) AGM design, it is engineered to fire up larger engines even in less-than-ideal conditions.
The right-positive polarity ensures seamless installation in U1R-compatible models like the LGT2654, eliminating potential rewiring headaches.
Its spill-proof, vibration-resistant construction allows it to handle the bumps and jolts of uneven terrain without leaking or failing.
The AGM chemistry also supports deep discharge recovery, meaning the battery is more likely to bounce back if the lights are accidentally left on, outshining lower-CCA alternatives in resilience and performance.
Key Features: 12V; 320 CCA; Sealed Lead Acid (SLA) / AGM design; Dimensions: 7.62″ x 5.00″ x 6.25″; Right-Positive Polarity; 1 Year Warranty.
Pros:
- 320 CCA delivers maximum starting power for heavy-duty riding mowers.
- AGM spill-proof and vibration resistant construction.
- Excellent deep discharge recovery capability.
- Offers premium performance and durability at a slightly lower price than the OEM battery.
Cons:
- Does not include mounting hardware or a wire harness.
- Trades some cost-efficiency compared to budget options.
2. UPLUS U1 AGM Riding Mower Battery
Don’t let the modest price tag fool you—this budget-savvy powerhouse punches well above its weight, providing 250 cold cranking amps (CCA) and a 19Ah capacity.
It is a smart pick for mid-sized Husqvarna mowers and is compatible with several major brands. What sets it apart is the use of 99.99% pure primary lead, which enhances charge efficiency and extends its lifespan.
The maintenance-free AGM design means you don’t need to check water levels or worry about acid leaks. This model includes a responsive U.S.-based support team and is backed by a generous 15-month warranty.
While it lacks the raw cranking strength of 320CCA models, it handles standard 18–22hp engines with ease, delivering better value for average-duty mowing tasks.
Key Features: AGM Sealed Lead Acid; 250A CCA; 19Ah Capacity; Dimensions: 7.68L x 4.92W x 6.93H inches; Left-Positive Polarity; 15 Month Warranty.
Pros:
- Solid 250 CCA starting power for mid-sized mowers.
- Maintenance-free AGM design with long shelf life.
- Enhanced longevity due to 99.99% pure primary lead construction.
- Excellent value, offering OEM-level compatibility at a much lower cost.
Cons:
- Lower cranking power compared to premium options.
- Does not include mounting hardware.
3. Husqvarna OEM 430765 Lawn Mower Battery
There’s something undeniably reassuring about installing a genuine Husqvarna OEM battery—it provides the factory seal of approval for perfect fit, function, and compatibility.
This 430765 replacement is engineered to precisely match the original specifications of your Husqvarna mower, ensuring seamless integration with zero guesswork on polarity, size, or terminal placement.
It is the go-to choice if you own a legacy model, such as those in the 917 or 944 series, and need absolute peace of mind that every start will be smooth.
It fits precisely in OEM trays and works flawlessly with factory wiring harnesses, eliminating the need for modifications.
For users who value factory fidelity over enhanced features, this unit is the gold standard, guaranteeing fit without the risks associated with non-OEM parts.
Key Features: Part Number 430765; Type: Genuine OEM Husqvarna part; Replaces Part Numbers 430765 and 583461801; Compatibility with Craftsman and various Husqvarna model series.
Pros:
- Guaranteed perfect fit and direct replacement capability.
- Zero compatibility issues or installation risks.
- Ideal for mowers still under warranty or for purist owners.
- Ensures seamless integration with factory wiring.
Cons:
- No published performance specifications (CCA or amp-hour ratings).
- Higher cost compared to aftermarket batteries with similar features.
4. Mighty Max ML-U1 12V 200CCA
Tailored for compact Husqvarna lawn tractors like the LT130, this 200CCA compact performer strikes a smart balance between size, power, and affordability. It is ideal for smaller residential mowers that do not require industrial-level cranking strength.
The left-positive polarity matches the wiring layout of many entry-level Husqvarna models, simplifying installation.
At 7.62 x 5.00 x 7.00 inches, it fits tight engine compartments easily. Its AGM sealed design ensures zero leaks and minimal maintenance, making it perfect for weekend warriors.
While 200 CCA is not built for massive 24+HP engines, it is more than sufficient for sub-20HP mowers in temperate climates and showed strong resistance to vibration during testing.
It offers excellent value and durability, making it a sweet spot for budget-conscious users with modest mowing needs.
Key Features: 12V; 200 CCA; SLA / AGM Battery Type; Dimensions: 7.62″ x 5.00″ x 7.00″; Left-Positive Polarity; 1 Year Warranty.
Pros:
- 200 CCA is sufficient for entry-level and mid-tier Husqvarna mowers.
- Compact size fits tight engine compartments easily.
- AGM sealed and vibration-resistant construction.
- Excellent value, outperforming basic OEM units in durability.
Cons:
- Lower cranking power means it is not suitable for large engines.
- Struggles in prolonged sub-freezing cold spells.
5. Mighty Max ML-U1R-CCA 12V 200CCA
If your Husqvarna mower specifically demands right-side positive polarity, this ML-U1R-CCA is a precision-fit solution built for U1R-style enclosures found in models like the YTH2454. This battery eliminates the wiring headaches common with universal replacements.
Delivering 200 cold cranking amps (CCA), it provides reliable starts for mid-sized lawn tractors, easily turning over 20–22HP engines in spring and summer conditions. The AGM sealed construction makes it maintenance-free and spill-proof.
It also incorporates deep discharge recovery, which can be crucial if you forget to disconnect the battery during the off-season.
This model provides a smart alternative to OEM batteries when you prioritize aftermarket durability with exact-fit compatibility for right-positive terminal requirements without overspending.
Key Features: 12V; 200 CCA; Sealed Lead Acid (SLA); Dimensions: 7.62 x 5.00 x 6.25 inches; Right-Positive Polarity; 1 Year Warranty.
Pros:
- Right-positive polarity provides exact fit and eliminates wiring modifications.
- AGM sealed and maintenance-free construction.
- Features deep discharge recovery capability.
- Solid performance for average-duty use in mid-sized mowers.
Cons:
- Lower cranking power compared to the 320CCA model.
- Not optimized for frigid climates or oversized engines.
- Does not include a wire harness.
Choosing the Right Battery for Your Husqvarna Lawn Mower (Detailed Buying Guide)
Selecting the right replacement battery is crucial for ensuring your Husqvarna mower starts reliably and performs optimally. Focus on key specifications, fit, and compatibility to avoid electrical issues.
Understanding Battery Types & Key Specs
Lawn mower batteries are typically either Sealed Lead Acid (SLA) or Absorbed Glass Mat (AGM) types. Both are valve-regulated and generally spill-proof, but AGM batteries often offer superior performance and longevity.
- Cold Cranking Amps (CCA): This is arguably the most important factor. CCA measures the battery’s ability to start the mower in cold weather, so a higher CCA means more starting power. Always match or exceed your mower’s original battery CCA rating to ensure dependable starting.
- Amp Hours (Ah): Ah indicates the battery’s capacity—how long it can deliver a certain amount of current. While critical for sustained runtimes in electric models, CCA is the primary concern for starting power.
- Battery Group Size: The group size (e.g., U1) defines the physical dimensions of the battery. You must always confirm that the group size matches your mower’s battery compartment to ensure a proper fit.
Polarity: A Critical Match
Polarity (Positive/Negative Terminal Placement): This element is vital and frequently overlooked. Batteries are manufactured with either a positive terminal on the right or on the left. You must match the polarity of your old battery, as using the wrong polarity can damage your mower’s electrical system.
Additional Features to Consider
- Warranty: A longer warranty (one year or more) signals the manufacturer’s confidence in the product’s reliability and durability.
- Vibration Resistance: Mowers generate significant vibration, so batteries designed to withstand these jolts will last longer. The construction of AGM batteries often helps them resist vibration.
- Genuine OEM vs. Aftermarket: Genuine Husqvarna batteries (like the 430765) guarantee compatibility but often come at a higher price. Reputable aftermarket brands, such as Mighty Max and UPLUS, can offer comparable performance and reliability at a lower cost.