Best Lawn Mower Battery (2026): 5 Top Picks Compared
Five lawn mower batteries for cordless mowers, riding tractors and utility equipment: voltage, cold cranking amps, dimensions, safeguards and warranties compared.
On this page
Top picks at a glance
As an Amazon Associate I earn from qualifying purchases.
- 1
Best Cordless Mower BatteryGreenworks 40V 4.0Ah9.6/10View on Amazon - 2
Best Riding Mower BatteryUPLUS 12V 330CCA U19.5/10View on Amazon - 3
Best High-CCA Riding BatteryWEIZE 12V 350CCA U19.5/10View on Amazon - 4
Best Lightweight 12V BatteryExpertPower YTX4L-BS9.4/10View on Amazon - 5
Best Compact 12V BatteryMighty Max YTZ14S9.4/10View on Amazon - 6WEIZE 12.8V 8Ah Lithium Battery for Lawn Mower and TractorView on Amazon
- 7
MARXON U1 Riding Lawn Mower Battery Garden Tractors BatteryView on Amazon - 8
UPLUS U1 Riding Lawn Mower BatteryView on Amazon - 9
WEIZE 12.8V 12Ah Lithium Battery for Lawn Mower and TractorView on Amazon - 10
Mighty Max Battery ML-U1 12V 200CCA Battery for CraftsmanView on Amazon
A reliable lawn mower battery ensures your equipment cranks promptly when starting or powers through a yard without fading. Choosing the best lawn mower battery depends on whether your machine runs on a 40V cordless lithium-ion platform or requires a 12V lead-acid starting battery for a riding tractor. We compared 5 replacement batteries across 12V and 40V systems, detailing cold cranking amps, dimensions, stated safeguards, and warranty terms from each listing.
AcreMowerLab earns a commission when you shop through links here. It never changes your price. Affiliate disclosure.
Quick picks
- Best Cordless Mower Battery Greenworks 40V 4.0Ah: 40V 4.0Ah lithium pack with built-in BMS safeguards and a 3 Year Warranty Check price on Amazon
- Best Riding Mower Battery UPLUS 12V 330CCA U1: 12V 25Ah Group U1 AGM battery with 330 CCA and a 15 Month Warranty Check price on Amazon
- Best High-CCA Riding Battery WEIZE 12V 350CCA U1: 12V Group U1 AGM starting battery delivering 350 CCA with a 1-year warranty Check price on Amazon
- Best Lightweight 12V Battery ExpertPower YTX4L-BS: 12V 4Ah AGM battery with 120 CCA weighing 2.9 pounds with a 1 year warranty Check price on Amazon
- Best Compact 12V Battery Mighty Max YTZ14S: 12V 11.2AH AGM battery providing 230 CCA with multi-position mounting Check price on Amazon
Our acreage picks
Greenworks 40V 4.0Ah Lithium-Ion Battery
40V 4.0Ah lithium-ion mower battery with an integrated LED fuel indicator, built-in BMS protection, and compatibility with 75+ tools.
Who it's for: owners of Greenworks 40V walk-behind mowers and yard tools who need a replacement pack with stated BMS protections.
Who should skip it: anyone seeking a starting battery for a gas lawn tractor or riding mower.
Read the full review
The Greenworks 40V 4.0Ah pack delivers fade-free lithium-ion power for cordless lawn mowers and powers 75+ Greenworks tools on the same platform. Built-in battery management safeguards protect the pack against overheat, short circuit, over-voltage, over-current, and over-charge conditions, while an integrated LED fuel indicator provides charge status. In the listing details, the spec table lists an amperage of 4 A alongside battery capacity of 4, and gives both 3 pounds and 1.4 kg for weight. The listing includes 1 battery and states a 3 Year Warranty.
Pros
- 40V 4.0Ah capacity powers walk-behind mowers and 75+ compatible tools
- Built-in BMS safeguards against overheat, short circuit, over-voltage, over-current, and over-charge
- Integrated LED fuel indicator displays remaining battery charge
- Stated 3 Year Warranty is the longest warranty term among our picks
Cons
- Not compatible with 12V riding mower or lawn tractor electrical systems
- Charger is not included with this standalone battery pack
- Listing spec table confuses amperage with capacity by stating 4 A
- No cold cranking amps figure is stated for this lithium-ion pack
UPLUS 12V 330CCA Group U1 AGM Riding Mower Battery
12V 25Ah BCI Group U1 AGM starting battery delivering 330 CCA with 99.99% pure lead construction and a 15-month warranty.
Who it's for: owners of riding mowers from John Deere, Cub Cadet, Husqvarna, or Craftsman wanting a 330 CCA AGM battery with a 15-month warranty.
Who should skip it: anyone whose riding mower battery tray requires a right-hand positive terminal layout.
Read the full review
The UPLUS BCI Group U1 battery provides 12V and 25Ah capacity with 330 Cold Cranking Amps for lawn tractors and garden mowers. The listing highlights 99.99% pure primary lead to avoid toxic fume release, calcium-calcium alloy plates to reduce grid corrosion, and low-temperature engine cranking rated down to -22℉. Terminal layout places the positive red terminal on the left and the negative black terminal on the right. The listing does not state battery weight, and its specification table is blank. UPLUS states a 15 Month Warranty alongside a 60 day refund window.
Pros
- 330 CCA starting output with stated starting ability at -22℉
- 15 Month Warranty with a 60 day refund window
- 25Ah capacity using 99.99% pure primary lead without toxic fumes
- Fits John Deere, Cub Cadet, Husqvarna, Craftsman, Toro, Ariens, Poulan Pro, and Troy-Bilt
Cons
- Weight is not stated in the listing bullets or specification data
- Terminal polarity has positive on the left, requiring correct cable reach
- No UL, ETL, or CSA electrical safety certification is stated
- Spec table on the listing is empty with all data in bullet points
WEIZE 12V 350CCA BCI Group U1 AGM Lawn Mower Battery
12V 350 CCA BCI Group U1 AGM starting battery for lawn tractors and mowers, compatible with John Deere, Toro, Cub Cadet, and Craftsman.
Who it's for: owners of riding mowers and lawn tractors needing 350 CCA for dependable starting power.
Who should skip it: buyers who want an explicitly stated amp-hour rating or documented safety listings.
Read the full review
The WEIZE BCI Group U1 battery delivers 12V and 350 Cold Cranking Amps, offering the highest cranking rating among the 12V batteries compared here. Built with SLA AGM technology, it is designed for lawn tractors and light utility mowers from brands such as John Deere, Toro, Cub Cadet, and Craftsman. The listing contains internal contradictions: bullets give a weight of 21.45 lbs while the spec table lists 21.5 pounds, and bullets note a total height of 7.09 inches while dimensions show 6.22 inches height. It does not state an amp-hour capacity figure. The listing states a 1-year warranty (listed as 1 years in the spec table).
Pros
- 350 Cold Cranking Amps provides the highest cranking output among our picks
- Group U1 fit for John Deere, Toro, Cub Cadet, and Craftsman tractors
- Absorbed Glass Mat (AGM) construction requires no water refilling
- Stated 1-year warranty from the manufacturer
Cons
- Listing contradicts itself on weight: 21.45 lbs in bullets versus 21.5 pounds in the spec table
- Height is listed as 6.22 inches in the table but 7.09 inches total height in bullets
- Amp-hour capacity is not stated on the listing
- No safety certifications or specific protective safeguards are stated
ExpertPower YTX4L-BS 12V 4Ah 120 CCA AGM Battery
12V 4Ah 120 CCA sealed AGM battery weighing 2.9 pounds, offering maintenance-free spill-proof operation for small engines.
Who it's for: users needing a very small, lightweight 12V battery for compact utility engines or small mowers requiring 120 CCA or less.
Who should skip it: owners of standard riding mowers and lawn tractors that require 300 CCA or higher.
Read the full review
The ExpertPower YTX4L-BS provides 12V and 4Ah capacity with 120 Cold Cranking Amps in a lightweight 2.9-pound sealed AGM housing. The listing notes that its 4Ah rating is upgraded from standard 3Ah units, serving small-displacement engines such as 50cc to 110cc utility machines, scooters, and compact equipment. The listing exhibits a minor contradiction in dimension labeling: bullets describe the unit as 4.45"L x 2.76"W x 3.39H" while the spec table labels the dimensions 2.76"D x 4.45"W x 3.39"H. It is fully sealed and maintenance-free, requiring no water refilling. The manufacturer states a 1 year warranty.
Pros
- Lightest 12V battery here at 2.9 pounds
- Compact footprint of 4.45 x 2.76 x 3.39 inches
- Spill-proof AGM construction requires no water refilling
- 1 year manufacturer warranty stated in the listing
Cons
- 120 CCA is insufficient for large twin-cylinder lawn tractors
- 4Ah capacity offers limited reserve energy compared to Group U1 units
- Dimension labels swap depth and length between bullets and spec table
- No UL, ETL, or CSA listing is stated
Mighty Max YTZ14S 12V 11.2Ah 230 CCA AGM Battery
12V 11.2Ah 230 CCA spill-proof SLA AGM battery designed for shock and vibration resistance with multi-position mounting.
Who it's for: equipment owners who need a compact 12V battery with 230 CCA that fits tight trays and allows flexible mounting positions.
Who should skip it: owners of full-size lawn tractors designed for standard BCI Group U1 batteries.
Read the full review
The Mighty Max YTZ14S is a 12V 11.2AH sealed lead-acid AGM battery providing 230 Cold Cranking Amps. Measuring 6.00 inches by 3.44 inches by 4.38 inches, this compact unit fits smaller garden equipment, specialized mowers, and powersports vehicles where a standard Group U1 battery will not fit. The listing specifies that it can be mounted in any position and resists shocks and vibration, but notes that screws are included while wire harnesses and mounting accessories are not. The listing has a blank specification table and does not state battery weight or a concrete warranty term.
Pros
- Compact dimensions of 6.00 x 3.44 x 4.38 inches fit smaller battery compartments
- Spill-proof AGM design allows mounting in any position
- Resists shocks and vibration across wide operating temperatures
- 11.2AH capacity delivers 230 Cold Cranking Amps
Cons
- No concrete warranty term is stated on the listing
- No wire harness or mounting accessories included in the package
- Weight is not stated anywhere on the listing
- Lower cranking output at 230 CCA than Group U1 lawn tractor batteries
Other machines to compare
WEIZE 12.8V 8Ah Lithium Battery for Lawn Mower and TractorCheck price on Amazon
MARXON U1 Riding Lawn Mower Battery Garden Tractors BatteryCheck price on Amazon
UPLUS U1 Riding Lawn Mower BatteryCheck price on Amazon
WEIZE 12.8V 12Ah Lithium Battery for Lawn Mower and TractorCheck price on Amazon
Mighty Max Battery ML-U1 12V 200CCA Battery for CraftsmanCheck price on Amazon
Side-by-side specs
| Model | Acre Score | Type | Voltage | Capacity | CCA | Weight | Warranty |
|---|---|---|---|---|---|---|---|
| Greenworks 40V 4.0Ah | 9.6/10 | Lithium-Ion | 40 volts | 4.0Ah | Not stated | 3 pounds | 3 Year Warranty |
| UPLUS 12V 330CCA U1 | 9.5/10 | SLA AGM | 12V | 25Ah | 330A CCA | Not stated | 15 Month Warranty |
| WEIZE 12V 350CCA U1 | 9.5/10 | SLA AGM | 12V | Not stated | 350CCA | 21.45 lbs | 1-year warranty |
| ExpertPower YTX4L-BS | 9.4/10 | SLA AGM | 12 volts | 4 amp_hours | 120 CCA | 2.9 pounds | 1 year |
| Mighty Max YTZ14S | 9.4/10 | SLA AGM | 12 Volt | 11.2 AH | 230 CCA | Not stated | Not stated |
Specifications are manufacturer rated as listed, collected 8 October 2026.
Acreage and terrain fit
Greenworks 40V 4.0Ah
UPLUS 12V 330CCA U1
WEIZE 12V 350CCA U1
ExpertPower YTX4L-BS
Mighty Max YTZ14S
Buying guide: choosing the best lawn mower battery
Lithium-ion vs lead-acid AGM
Cordless electric mowers use high-voltage lithium-ion packs, such as the Greenworks 40V 4.0Ah battery, which provide fade-free power, light weight at 3 pounds, and compatibility across 75+ tools. In contrast, gas-powered riding mowers and lawn tractors rely on 12V lead-acid AGM starting batteries to crank the engine. Absorbed Glass Mat (AGM) construction suspends electrolyte in fiberglass mats, providing a spill-proof, maintenance-free design that eliminates water refilling.
Cold cranking amps for riding mowers
Cold Cranking Amps (CCA) measure the starting power a 12V battery delivers to crank an engine. Among our picks, the WEIZE U1 delivers 350 CCA and the UPLUS U1 provides 330 CCA, making both suitable for starting single-cylinder and twin-cylinder lawn tractors. The UPLUS listing also specifies starting ability at -22℉. Smaller units provide lower cranking output: the Mighty Max YTZ14S delivers 230 CCA and the ExpertPower YTX4L-BS delivers 120 CCA.
BCI group sizes and terminal polarity
Most standard riding lawn mowers use BCI Group U1 battery trays. The UPLUS and WEIZE models follow this Group U1 footprint, measuring 7.68 inches in length. Both feature left-positive terminal layouts: positive red on the left and negative black on the right. Always verify cable reach and tray dimensions before selecting a replacement, as reversing polarity can damage the mower charging circuit.
Battery management and safety
Lithium-ion mower batteries require electronic battery management systems (BMS) to regulate charging and discharging. The Greenworks listing specifies safeguards against overheat, short circuit, over-voltage, over-current, and over-charge conditions. Lead-acid batteries achieve safety through sealed, spill-proof construction. UPLUS states a leak-proof design using 99.99% pure primary lead without toxic fumes, while Mighty Max and ExpertPower state vibration resistance.
Safe installation and handling
Always turn off the mower ignition and disconnect the negative black cable before removing the positive red cable. When installing the replacement, attach the positive red cable before the negative black cable. Wear protective eyewear and work in a ventilated space.
Read the manual, keep children and pets out of the yard while you work, wear eye and hearing protection and sturdy footwear, and never exceed the slope rating of your machine. Refuel only with the engine off and cool. See CPSC lawn mower safety. Read our Safety Disclaimer.
The Acre Score explained
The Acre Score weighs five factors: performance (voltage, amp-hours, and cold cranking amps), build quality (cell type, casing, and terminal design), value (capacity and fit relative to specs), safety (battery management systems, sealed leak-proof construction, and stated protections), and warranty (stated term and coverage). A factor the listing does not state scores zero.
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Greenworks 40V 4.0Ah | 9.6 | 29 | 20 | 20 | 6 | 3 |
| UPLUS 12V 330CCA U1 | 9.5 | 29 | 20 | 20 | 3 | 3 |
| WEIZE 12V 350CCA U1 | 9.5 | 29 | 20 | 21 | 0 | 2 |
| ExpertPower YTX4L-BS | 9.4 | 26 | 19 | 19 | 3 | 2 |
| Mighty Max YTZ14S | 9.4 | 27 | 19 | 19 | 3 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
FAQ: mowing large lots
How long does lawn mower battery last?
Service life depends on battery chemistry, charging habits, and winter storage. The UPLUS listing claims longevity over 5 years with a 15 Month Warranty, while Greenworks provides a 3 Year Warranty. WEIZE and ExpertPower each state a 1-year warranty term, while Mighty Max does not state a concrete warranty term. Keeping a 12V battery charged during cold winter months prevents sulfation and premature failure.
How to replace lawn mower battery?
Park the mower on level ground, shut off the engine, remove the key, and engage the parking brake. Disconnect the negative black terminal first, then the positive red terminal. Remove the hold-down bracket and lift the battery from the tray. Clean any terminal corrosion, place the new battery into position, secure the bracket, and attach the positive red cable first, followed by the negative black cable.
Why does my lawn mower battery keep dying?
Frequent battery discharge often stems from corroded terminal connections, loose ground cables, a failing voltage regulator, or parasitic draw from lighting accessories. A battery left discharged over winter can also develop internal plate damage that prevents it from holding 12V.
Are battery lawn mowers good?
Cordless battery lawn mowers eliminate fuel storage, oil changes, air filter maintenance, and exhaust emissions. Packs like the Greenworks 40V 4.0Ah battery deliver push-button starting and can be interchanged with 75+ compatible yard tools on the same platform.
More mowing guides
- Best 21 Inch Lawn Mower: 5 Cordless and Gas Picks (2026)
- Best Mower Blade Sharpener: 4 Picks for Riders and Large Lawns
- How to Fix Hydrostatic Drive on Riding Mower
- Best Electric Riding Mower: 4 Picks by Rated Acres
- Best Riding Mower for Hills: 4 Picks and How to Read Slope Ratings
Visit our mower maintenance hub for additional equipment care and maintenance guides.
