Finding the right replacement lawn mower battery doesn’t need to be confusing. I prefer nine of the best options for 2026 and sorted out which ones are worth your money.
You’ll see picks for walk‑behind mowers, riding mowers, and compact tractors, with clear notes on power, runtime, and fit. This quick guide focuses on real-world performance so you can swap batteries and get back to cutting faster.
| 24V 6.0Ah Replacement Battery Pack for Greenworks |
| High-Capacity Pick | Voltage: 24 V | Battery Type: Lithium-ion | Capacity: 6.0 Ah | VIEW LATEST PRICE | Read Our Analysis |
| Fancy Buying 24V 8Ah Replacement Battery for Greenworks |
| Longest Runtime | Voltage: 24 V | Battery Type: Lithium-ion | Capacity: 8.0 Ah | VIEW LATEST PRICE | Read Our Analysis |
| Greenworks 24V 6.0Ah Replacement Lithium Battery |
| Reliable Replacement | Voltage: 24 V | Battery Type: Lithium-ion | Capacity: 6.0 Ah | VIEW LATEST PRICE | Read Our Analysis |
| UPLUS U1 12V 360CCA Riding Lawn Mower Battery |
| Heavy-Duty Starter | Voltage: 12 V | Battery Type: Sealed Lead Acid (AGM) | Capacity: 26 Ah | VIEW LATEST PRICE | Read Our Analysis |
| Mighty Max ML3-12 12V 3.4Ah Toro Replacement Battery |
| Compact Replacement | Voltage: 12 V | Battery Type: Sealed Lead Acid (SLA/AGM) | Capacity: 3.0–3.4 Ah | VIEW LATEST PRICE | Read Our Analysis |
| MARXON U1 280CCA Riding Lawn Mower AGM Battery |
| Durable AGM Choice | Voltage: 12 V | Battery Type: Sealed Lead Acid (AGM) | Capacity: (Capacity not given; 280 CCA specified) | VIEW LATEST PRICE | Read Our Analysis |
| Greenworks 40V 6.0Ah Lithium Battery Replacement |
| Powerful 40V Option | Voltage: 40 V | Battery Type: Lithium-ion | Capacity: 6.0 Ah | VIEW LATEST PRICE | Read Our Analysis |
| Greenworks 40V 6.0Ah Replacement Battery (2-Pack) |
| Two-Pack Value | Voltage: 40 V | Battery Type: Lithium-ion | Capacity: 6.0 Ah (2-pack) | VIEW LATEST PRICE | Read Our Analysis |
| Mighty Max ML-U1 12V 200CCA Lawn Tractor Battery |
| Tractor-Grade Power | Voltage: 12 V | Battery Type: Sealed Lead Acid (SLA/AGM) | Capacity: (Ah not given; 200 CCA specified) | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
24V 6.0Ah Replacement Battery Pack for Greenworks
In case you want a reliable upgrade that keeps your Greenworks tools running longer, this 24V 6.0Ah replacement pack is a strong choice. You’ll get two high capacity lithium ion batteries that fit many Greenworks 24V models like 29842, 29852, LB24A020, and more. They power mowers, trimmers, blowers, and chainsaws with fast charging and low power draw. You won’t deal with memory effect, and safety certifications include FCC, RoHS, and CE. A 30 day return window and 12 month warranty protect you. Should you require help, customer support is ready to assist.
- Voltage:24 V
- Battery Type:Lithium-ion
- Capacity:6.0 Ah
- Primary Application:Greenworks 24V outdoor tools (mower, trimmer, blower, chainsaw)
- Safety / Certifications:FCC, RoHS, CE
- Warranty / Return Policy:30-day return; 12-month warranty
- Additional Feature:2-pack high-capacity set
- Additional Feature:Fast-charging lithium cells
- Additional Feature:Compatible with many Greenworks
Fancy Buying 24V 8Ah Replacement Battery for Greenworks
You’re likely to prefer the Fancy 24V 8Ah replacement battery provided you need longer run time for Greenworks tools and want a dependable swap that just clicks into place. You’ll see it fits models like 29842, 29852, LB24A020, 24322, BAG709, 29972, and LB24A040. It comes as a two pack that replaces 6.0Ah cells, giving more mowing time and fewer interruptions. The lithium ion design lets you charge anytime without memory issues. Safety features include CE FCC RoHS and smart ECP protection against overcharge, overheating, short circuits, and overcurrent. An LED shows remaining power. Durable casing soaks up shocks.
- Voltage:24 V
- Battery Type:Lithium-ion
- Capacity:8.0 Ah
- Primary Application:Greenworks 24V outdoor tools (mower, trimmer, blower)
- Safety / Certifications:CE, FCC, RoHS (plus Smart ECP protection)
- Warranty / Return Policy:(Warranty implied; safety features listed) — seller support noted (no explicit months listed)
- Additional Feature:8.0Ah extended runtime
- Additional Feature:LED charge level indicator
- Additional Feature:Shock-resistant impact casing
Greenworks 24V 6.0Ah Replacement Lithium Battery
Should you need a reliable backup for light yard work, the Greenworks 24V 6.0Ah replacement battery fits the bill, especially for homeowners who own multiple Greenworks 24V tools like a mower, trimmer, or blower. You’ll like its 24V, 6Ah lithium-ion cell that stays light at 1.79 pounds and snaps into chargers for compatible models such as 29842, 29852, and 24322. It charges fast, avoids memory effect, and meets FCC RoHS and CE safety marks. Dongguan Tenway backs it with a 12-month warranty and 30-day returns, so you can buy with confidence and ask seller support whenever needed.
- Voltage:24 V
- Battery Type:Lithium-ion
- Capacity:6.0 Ah
- Primary Application:Greenworks 24V outdoor tools (mower, trimmer, blower, chainsaw)
- Safety / Certifications:FCC, RoHS, CE
- Warranty / Return Policy:30-day return; 12-month product quality service
- Additional Feature:Compact physical dimensions listed
- Additional Feature:Manufacturer: Dongguan Tenway
- Additional Feature:ASIN and launch date
UPLUS U1 12V 360CCA Riding Lawn Mower Battery
Pick the UPLUS U1 whenever you want a dependable, maintenance-free riding mower battery that starts fast even in cold weather. You’ll like its 12V, 360 CCA power and 26Ah capacity because they give reliable cranking down to minus 22°F. The sealed AGM design means no spills and no watering, so you can focus on the yard. It uses pure lead for cleaner charging and longer life, and calcium-calcium tech cuts self discharge and corrosion. It fits many brands like John Deere and Toro, and it resists leaks and vibration. You get a 15 month warranty, 60 day refund, and quick local support.
- Voltage:12 V
- Battery Type:Sealed Lead Acid (AGM)
- Capacity:26 Ah
- Primary Application:Riding lawn mowers / tractors
- Safety / Certifications:Manufactured/tested (no CE/FCC listed); AGM safety features
- Warranty / Return Policy:15-month warranty; 60-day refund window
- Additional Feature:360A cold-cranking amps
- Additional Feature:Calcium-calcium technology
- Additional Feature:Left-positive terminal orientation
Mighty Max ML3-12 12V 3.4Ah Toro Replacement Battery
Should you need a reliable, maintenance-free replacement for Toro model 106-8397, the Mighty Max ML3-12 12V 3.4Ah battery is built for that job and will ease the worry of unexpected downtime. You’ll like that it’s a sealed lead acid AGM unit, rechargeable and UL certified. It fits tight spaces at 5.28 x 2.64 x 2.64 inches and mounts any way you need. It handles shocks, vibration, and wide temperatures while providing a high discharge rate and long life. Note the F1 terminal and that the pack ships alone with a one-year warranty.
- Voltage:12 V
- Battery Type:Sealed Lead Acid (SLA/AGM)
- Capacity:3.0–3.4 Ah
- Primary Application:Toro lawn mower replacement
- Safety / Certifications:UL certified
- Warranty / Return Policy:1-year warranty
- Additional Feature:F1 terminal type
- Additional Feature:UL certified safety
- Additional Feature:Mountable in any position
MARXON U1 280CCA Riding Lawn Mower AGM Battery
Should you’re looking for a reliable battery that keeps your riding mower starting strong through hot summers and chilly mornings, the MARXON U1 280CCA is a solid choice. You get a 12V AGM sealed battery with 280 CCA that fits many brands like John Deere, Toro, Cub Cadet, and Craftsman. It’s maintenance free so you won’t add water, and its corrosion resistant alloy helps prevent leaks. Built shockproof for heat and vibration, it promises over five years of service. The positive terminal sits left, dimensions are compact, and a 15 month warranty plus US support offers peace of mind.
- Voltage:12 V
- Battery Type:Sealed Lead Acid (AGM)
- Capacity:(Capacity not given; 280 CCA specified)
- Primary Application:Riding lawn mowers / tractors
- Safety / Certifications:(No CE/FCC listed); patented corrosion resistance, safety features
- Warranty / Return Policy:15-month warranty
- Additional Feature:280A cold-cranking amps
- Additional Feature:Patented corrosion-resistant alloy
- Additional Feature:USA offices/warehouse presence
Greenworks 40V 6.0Ah Lithium Battery Replacement
Should you want a reliable, longer-running power source for your Greenworks 40V tools, this 6.0Ah lithium replacement battery is a smart choice that fits lawn mowers, trimmers, blowers, and many other G-MAX models. You’ll notice the 40 volt, 6.0Ah pack gives longer run time and faster charging because it uses high capacity lithium cells. It’s compatible with many model numbers and tools, so you won’t worry about fit. It meets FCC, RoHS, and CE safety tests, and comes with a 30 day return policy plus 12 months of product support. You’ll get clear customer service and an easy shopping experience.
- Voltage:40 V
- Battery Type:Lithium-ion
- Capacity:6.0 Ah
- Primary Application:Greenworks 40V G-MAX tools (mower, trimmer, blower)
- Safety / Certifications:FCC, RoHS, CE
- Warranty / Return Policy:30-day return; 12-month product quality service
- Additional Feature:40V G-MAX compatibility
- Additional Feature:High-capacity 6.0Ah cell design
- Additional Feature:Fast-charging premium cells
Greenworks 40V 6.0Ah Replacement Battery (2-Pack)
In case you rely on Greenworks 40V tools and want longer runtime without frequent recharges, this 6.0Ah 2-pack is a great choice for busy homeowners and weekend gardeners. You get two high-capacity 40 volt lithium-ion batteries that fit many Greenworks models, including mowers, trimmers, and blowers, so you can swap batteries and keep working. They use premium cells for fast charging and low power draw, and they won’t suffer memory loss. They meet FCC, RoHS, and CE safety standards. You’ll have a 30-day return window and a 12-month quality service period, with responsive support should questions arise.
- Voltage:40 V
- Battery Type:Lithium-ion
- Capacity:6.0 Ah (2-pack)
- Primary Application:Greenworks 40V G-MAX tools (mower, trimmer, blower)
- Safety / Certifications:FCC, RoHS, CE
- Warranty / Return Policy:30-day return; 12-month product quality service
- Additional Feature:Sold as 2-pack bundle
- Additional Feature:Designed for 40V lawn mowers
- Additional Feature:Includes wide model compatibility
Mighty Max ML-U1 12V 200CCA Lawn Tractor Battery
Provided you own a Craftsman 25780 lawn tractor or a similar mower and want a reliable, maintenance-free replacement, the Possibly Max ML-U1 12V 200CCA is a smart choice that fits right and gets you cutting sooner. You’ll like its sealed SLA AGM design that’s spill proof, mounts in any position, and resists shocks and vibration. It delivers 200 CCA and 300 watts, handles hot and cold weather, and recovers from deep discharge. It weighs 12.89 pounds and uses left positive polarity. The package includes battery and screws only. Expect a one-year warranty and strong user satisfaction.
- Voltage:12 V
- Battery Type:Sealed Lead Acid (SLA/AGM)
- Capacity:(Ah not given; 200 CCA specified)
- Primary Application:Craftsman lawn tractor / mower
- Safety / Certifications:(No CE/FCC listed); SLA/AGM safety and spill-proof design
- Warranty / Return Policy:1-year warranty; Amazon 30-day return guarantee
- Additional Feature:200A cold-cranking amps
- Additional Feature:Deep-discharge recovery capable
- Additional Feature:Includes mounting screws only
Factors to Consider When Choosing Replacement Lawn Mower Batteries
Whenever I help people pick a replacement lawn mower battery, I look at battery chemistry, voltage compatibility, capacity and runtime, physical size, and safety certifications to make sure the fit and performance match your mower and your peace of mind. I’ll explain how chemistry affects longevity, why voltage must match your mower, and how capacity relates to how long you can mow before recharging. Then we’ll check physical dimensions and required safety marks so you don’t end up with a battery that won’t fit or meet basic safety standards.
Battery Chemistry Type
I’ll walk you through the battery chemistry choices so you can pick the one that fits your mower and your life. I’ve worked with different batteries, and I know the decision feels heavy, literally and figuratively. Lead-acid, including AGM and SLA, is cheap up front and gives strong starting power. It’s heavier and needs careful charging to avoid sulfation. Lithium-ion, like Li‑ion or Li‑polymer, is lighter, holds more energy, charges faster, and lasts longer per amp-hour. NiMH shows up rarely; it’s safer than old NiCd, has no memory effect, but is bulkier and less dense than lithium. Chemistry affects charge and discharge behavior, the charger you need, and safety features. Take note thermal differences: lead-acid tolerates cold better, while lithium requires a BMS and thermal safeguards.
Voltage Compatibility Check
Because voltage is the backbone of your mower’s electrical system, I want you to be careful and confident whenever choosing a replacement battery. I always tell readers to match the battery voltage exactly to the mower’s specified rating like 12V, 24V, 36V, or 40V. Check the user manual or the original battery label for the nominal voltage, since some packs show 24V made from two 12V cells. Never fit a higher-voltage pack into a lower-voltage system because excess voltage can overheat parts, void warranties, and create safety risks. Using a lower-voltage battery cuts performance and can keep the mower from starting or trigger fault modes. Suppose you contemplate changing voltages, talk to the manufacturer or a qualified technician initially.
Capacity And Runtime
In case you want your mower to finish the job without surprises, capacity and runtime are the two specs you need to understand initially. I look firstly at ampere-hours Ah because it tells me how much charge a pack holds. Higher Ah, like 8.0 versus 6.0, usually gives longer runtime for the same mower draw. To estimate runtime I divide Ah by the mower’s average current in amps. For example 6Ah divided by 3A is about two hours. Keep in mind voltage affects power not Ah so you must consider both when comparing packs. Real life gives 10 to 30 percent less run than math shows because load, grass conditions, cold, and age cut time. I balance longer runtime with added weight and cost to fit my needs.
Physical Size Fit
Whenever I size a replacement battery, I treat the mower’s battery bay like a puzzle piece: the pack has to slide in easily, the terminals must meet the cables without strain, and the lid needs to close without forcing anything. I measure length, width, and height inside the compartment and match those to the battery’s external dimensions. I also check terminal type and location so cables route without bending. Weight matters too, so I confirm the tray and clips can support the pack to avoid vibration or loosening. I allow at least a half inch of clearance on each side for ventilation and removal. Provided there is a cover, I add any insulation, brackets, or casing height to make sure the lid closes comfortably.
Safety Certifications Present
Whenever I pick a replacement battery for my mower, safety certifications are the initial thing I check, because they tell me the pack has been tested and tracked rather than just claimed to be safe. I look for CE, RoHS, and FCC or regional equivalents to know the battery follows electrical rules, limits hazardous substances, and won’t cause interference. I also verify UN 38.3 testing and proper transport classification so the pack is safe for air, ground, and sea travel. I prefer cells with third party lab listings like UL, TÜV, or Intertek that test abuse, vibration, and heat. I make sure the battery’s electronic protection and BMS were independently tested. Finally, I ask the maker for traceable test reports and batch codes so I can trust its safety record.
Durability And Protection
Because your mower faces bumps, heat, and wet grass each time you run it, I start choosing batteries built to take a beating and keep going. I look for impact resistant housings and internal vibration damping so drops and constant vibration don’t crack cells. I also prefer sealed designs like AGM or fully enclosed lithium packs that block moisture and cut corrosion risk in damp yards. Next, thermal management and heat resistant materials matter because high temperatures age cells fast; safety circuits help avoid that. I always check for strong protections against overcharge, over discharge, short circuits, and overcurrent so one fault doesn’t ruin the pack. Finally, meeting industry safety marks and clear cycle life specs tells me a battery was made to last.
Warranty And Support
I usually start checking the warranty and support because a good plan protects you once a battery fails prematurely or loses capacity faster than anticipated. I look at warranty length initially since batteries often show trouble within 6 to 24 months. I also verify whether reduced runtime counts as a defect and check the replacement threshold so I know at what point I qualify. Next I confirm the returns window and list of required proofs like receipt, serial number, and purchase date. I ask who pays shipping for replacements and whether the seller handles that. I value clear service channels and response time promises, such as phone and email with stated reply windows. Finally I read exclusions and care rules so I follow them and keep coverage valid.