Lawn Mower Battery for Craftsman: 5 Picks Compared (2026)
Five lawn mower battery options for Craftsman riders and cordless mowers compared by voltage, capacity, stated terminal fit, and warranty terms.
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Top picks at a glance
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- 1
Best OverallWEIZE 12.8V 12Ah U19.6/10View on Amazon - 2
Best Lead-Acid StarterMighty Max ML-U1 12V9.5/10View on Amazon - 3
Best High-Capacity V20TenHutt 20V 6.0Ah 2-Pk9.4/10View on Amazon - 4
Best OEM V20Craftsman V20 4Ah 2-Pk9.4/10View on Amazon - 5
UPLUS U1 Riding Lawn Mower BatteryView on Amazon - 6
DKLU1-M Group U1 Lithium LiFePO4 Lawn Mower BatteryView on Amazon - 7
WEIZE 12.8V 8Ah Lithium Battery for Lawn Mower and TractorView on Amazon - 8
WEIZE Lawn Garden AGM BatteryView on Amazon - 9
MARXON U1 Riding Lawn Mower Battery Garden Tractors BatteryView on Amazon - 10
MARXON U1 Riding Lawn Mower Batteries Garden Tractors BatteryView on Amazon
Finding the right lawn mower battery for craftsman equipment depends on whether you need a 12-volt starter battery for a riding lawn tractor or replacement packs for a cordless push mower. Craftsman mowers span multiple eras and battery platforms, from standard Group U1 starter cases on gas tractors to modern V20 and legacy C3 cordless systems. Below, we compare five replacement options using manufacturer published specifications, comparing voltage, capacity, stated weight, and warranty coverage.
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Quick picks
- Best Overall WEIZE 12.8V 12Ah U1: Highest Acre Score: 480CCA LiFePO4 battery with 12Ah capacity, 5.84 lb weight, and a 5-year warranty in bullets Check price on Amazon
- Best Lead-Acid Starter Mighty Max ML-U1 12V: Traditional SLA Group U1 fit for Craftsman riders with 200CCA and a 1-year warranty Check price on Amazon
- Best High-Capacity V20 TenHutt 20V 6.0Ah 2-Pk: Two 6.0Ah packs for Craftsman V20 mowers with fuel gauges and 1-year refund or replacement coverage Check price on Amazon
- Best OEM V20 Craftsman V20 4Ah 2-Pk: Official Craftsman V20 two-pack with 4Ah capacity, 60-minute charge time, and 3 LED indicators Check price on Amazon
Our acreage picks
WEIZE 12.8V 12Ah LiFePO4 Group U1 Battery
Lightweight 12.8V 12Ah LiFePO4 Group U1 starter battery delivering 480 Cold Cranking Amps for lawn tractors and riders.
Who it's for: Craftsman riding mower and lawn tractor owners who want high cranking power and significant weight reduction over traditional lead-acid units.
Who should skip it: buyers who prefer established lead-acid chemistry or those whose cable configuration requires a right-hand positive terminal without cable extension.
Read the full review
The WEIZE BCI Group U1 battery brings lithium iron phosphate (LiFePO4) chemistry to Craftsman lawn tractors and riding mowers. The listing highlights 480 Cold Cranking Amps, a 12.8V rating, and a 12Ah capacity in a standard Group U1 case measuring 7.68 by 5.12 by 7.1 inches. Terminals are square hole nut-and-bolt style with the positive terminal on the left. The listing contains an internal contradiction regarding coverage: the bullets state the battery carries a 5-year warranty, while the spec table lists a 2-year warranty term. Following our editorial policy, we prioritize the bullets while noting the discrepancy. Stated weight also varies slightly across the page, listed as 5.84 lb in the bullets, 5.8 lb for battery weight, and 6.4 lb for item weight.
Pros
- High 480CCA rating provides strong cranking power for lawn tractors
- LiFePO4 chemistry weighs 5.84 lb, less than half of standard lead-acid batteries
- Bullets state a 5-year warranty for tractor batteries
- Standard BCI Group U1 size with square hole nut and bolt terminals
Cons
- Spec table lists a 2-year warranty, contradicting the 5-year statement in the bullets
- Listing shows minor weight discrepancies between 5.84 lb, 5.8 lb, and 6.4 lb
- Left-positive terminal orientation must match your mower cable setup
- Caution notes risk of fire and burns if heated above 60°C
Mighty Max ML-U1 12V 200CCA SLA Battery
Sealed Lead Acid 12V 200CCA Group U1 battery designed as a direct replacement for Craftsman 25780 lawn tractors.
Who it's for: owners of Craftsman lawn tractors seeking an affordable, direct-fit SLA starter battery with a verified 1-year warranty.
Who should skip it: anyone looking to cut machine weight or seeking the higher cranking amperage delivered by lithium alternatives.
Read the full review
The Mighty Max ML-U1 is a conventional 12V Sealed Lead Acid (SLA/AGM) starter battery built to Group U1 dimensions of 7.62 by 5.00 by 7.00 inches. The listing specifies 200 Cold Cranking Amps and lists polarity with positive on the left and negative on the right, matching Craftsman tractor models such as the 25780. Weight is stated at 12.9 lb in both the bullets and the spec table. The listing consistently confirms a 1-year warranty across its text. It also notes that the package includes only the battery and terminal screws, without a wiring harness or extra mounting hardware.
Pros
- Direct drop-in Sealed Lead Acid Group U1 replacement for Craftsman 25780 lawn tractors
- Consistent 1-year warranty stated in both bullets and spec table
- Spill-proof AGM design resists vibration and can be mounted in any position
- Stated 200 Cold Cranking Amps delivers steady starting power
Cons
- Heaviest battery in this group at a stated 12.9 lb
- Lower cranking amps at 200CCA compared to lithium options
- Listing includes battery and screws only, with no wire harness or mounting accessories
- Lead-acid chemistry requires periodic maintenance charging during off-season storage
TenHutt 20V 6.0Ah Replacement Battery 2-Pack
High-capacity 20V 6.0Ah lithium-ion replacement two-pack with charge indicators for Craftsman V20 cordless mowers and tools.
Who it's for: users of Craftsman V20 cordless push mowers and power tools who want extended runtimes from higher amp-hour packs.
Who should skip it: owners of legacy Craftsman Bolt-On or DieHard series tools, which the listing explicitly states are incompatible.
Read the full review
The TenHutt two-pack provides replacement power for Craftsman V20 cordless tools and walk-behind mowers. The listing claims 6000mAh (6.0Ah) capacity per pack and features 3 LED fuel gauge indicators, built-in circuit protection, and an item weight of 2.8 lb for the package. However, the listing displays clear internal contradictions. While the title and bullets specify 20V operation, the spec table lists voltage as 18 volts direct current. Furthermore, the bullets promise free refund or replacement for one year, whereas the spec table lists 1.5 years. We trust the 20V rating and 1-year term from the bullets, but recommend buyers verify these details before ordering.
Pros
- Two high-capacity 6.0Ah (6000mAh) battery packs included
- Built-in 3 LED fuel gauge indicators monitor remaining charge
- Fits Craftsman V20 cordless power tools and chargers
- Built-in circuit protection against overload and deep discharge
Cons
- Listing contradicts itself by stating 20V in bullets but 18 volts DC in the spec table
- Bullets list a 1-year refund or replacement period while the spec table lists 1.5 years
- Does not fit older Craftsman 20V max Bolt-On or DieHard series
- Third-party brand with no stated charging time on the listing
CRAFTSMAN V20 4Ah Battery 2-Pack (CMCB204-2)
Original equipment Craftsman V20 4Ah lithium-ion battery two-pack featuring 3 LED charge indicators and a 60-minute charge time.
Who it's for: homeowners operating Craftsman V20 cordless mowers who prioritize genuine OEM equipment and direct charger compatibility.
Who should skip it: buyers seeking the maximum available runtime per charge or those who insist on a published warranty term on the listing.
Read the full review
The CRAFTSMAN CMCB204-2 pack supplies two genuine OEM 20V lithium-ion batteries rated at 4 amp-hours each. The listing specifies a 60-minute charge time, a 3 LED state of charge indicator, and premium grade high-energy cells. Battery weight is listed at 1.4 lb with package dimensions of 6.46 by 3.06 by 7.86 inches. Regarding warranty, the listing does not state a concrete term, instead directing customers to visit the manufacturer website. The spec table also contains a minor oddity, noting a unit count of 1 count despite the title and included components clearly confirming a two-pack.
Pros
- Genuine OEM Craftsman V20 battery pack ensures exact tool fit
- Includes two 4Ah lithium-ion batteries with high-energy cells
- Stated 60-minute charge time and 3 LED state of charge indicator
- Lightweight design at 1.4 lb per battery
Cons
- No warranty term is stated on the listing, which directs buyers to the brand website
- Spec table lists unit count as 1 count despite title stating 2-pack
- Lower 4Ah capacity than third-party 6.0Ah replacement packs
- Compatible only with Craftsman V20 cordless tools, not riding mowers
Enermall 19.2V 4.5Ah C3 Replacement Battery 2-Pack
Two-pack of 19.2V 4.5Ah Ni-MH replacement batteries for legacy Craftsman C3 cordless mowers and power tools.
Who it's for: owners looking to maintain older Craftsman C3 19.2V cordless yard equipment without buying new tools.
Who should skip it: anyone using newer Craftsman V20 platforms or seeking modern lithium-ion energy density.
Read the full review
The Enermall two-pack keeps legacy Craftsman 19.2V C3 cordless equipment operational. Each pack provides 4500mAh (4.5Ah) of capacity using nickel-metal hydride (Ni-MH) cells and features an integrated microchip for circuit protection. Weight is listed at 16 oz with dimensions of 3.9 by 4.3 by 3.1 inches. The spec table contains noticeable data errors, listing battery capacity as 4500 amp_hours instead of milliamp-hours and stating that 2 A batteries are required. Additionally, the warranty description states only the numeral 1 without specifying years or months, meaning no concrete warranty term is published.
Pros
- Provides replacement power for legacy Craftsman 19.2V C3 cordless tools
- Two 4.5Ah (4500mAh) battery packs included in the package
- Integrated microchip protects against overcharging, over-discharge, and short circuits
- Compatible with original Craftsman 19.2V chargers per the listing
Cons
- No concrete warranty term is stated on the listing, which only shows the number 1
- Older Ni-MH chemistry lacks the energy density of modern lithium packs
- Spec table contains errors, claiming 4500 amp_hours and 2 A batteries required
- Item dimensions of 3.9 x 4.3 x 3.1 in fit hand tools and small mowers only
Other machines to compare
UPLUS U1 Riding Lawn Mower BatteryCheck price on Amazon
DKLU1-M Group U1 Lithium LiFePO4 Lawn Mower BatteryCheck price on Amazon
WEIZE 12.8V 8Ah Lithium Battery for Lawn Mower and TractorCheck price on Amazon
WEIZE Lawn Garden AGM BatteryCheck price on Amazon
MARXON U1 Riding Lawn Mower Battery Garden Tractors BatteryCheck price on Amazon
MARXON U1 Riding Lawn Mower Batteries Garden Tractors BatteryCheck price on Amazon
Side-by-side specs
| Model | Acre Score | Battery chemistry | Voltage | Capacity | Cranking amps | Stated weight | Warranty |
|---|---|---|---|---|---|---|---|
| WEIZE BCI Group U1 (12.8V 12Ah) | 9.6/10 | LiFePO4 | 12.8V | 12Ah | 480CCA | 5.84 lb (listing bullets) | 5 years (bullets) / 2 years (table) |
| Mighty Max ML-U1 | 9.5/10 | SLA / AGM (Lead Acid) | 12V | 35 (spec table) | 200CCA | 12.9 lb | 1 year |
| TenHutt 20V 6.0Ah (CMCB205) | 9.4/10 | Lithium-ion | 20V (18V in spec table) | 6000mAh (6.0Ah) | Not stated | 2.8 lb (pair) | 1 year (bullets) / 1.5 year (table) |
| CRAFTSMAN V20 4Ah (CMCB204-2) | 9.4/10 | Lithium-ion | 20V | 4 amp_hours | Not stated | 1.4 lb (battery) | Not stated (visit website) |
| Enermall 19.2V 4.5Ah C3 | 9.3/10 | Ni-MH | 19.2V | 4500mAh (4.5Ah) | Not stated | 16 oz | Not stated (‘1’ in table) |
Specifications are manufacturer rated as listed, collected 9 October 2026.
Acreage and terrain fit
WEIZE 12.8V 12Ah U1
Mighty Max ML-U1 12V
TenHutt 20V 6.0Ah 2-Pk
Craftsman V20 4Ah 2-Pk
Enermall 19.2V C3 2-Pk
Buying guide: choosing a lawn mower battery for craftsman
Riding mower batteries vs cordless push mower packs
The first step in choosing a replacement is distinguishing between starter batteries and drive packs. Craftsman riding tractors powered by gas engines require a 12-volt lead-acid or lithium starter battery to turn over the starter motor. Walk-behind cordless mowers rely on higher-voltage multi-cell lithium or nickel packs, such as 20-volt or 19.2-volt systems, to power the cutting blade and drive motors directly. Never attempt to connect a cordless tool pack to a riding tractor starter system.
BCI Group U1 dimensions and terminal polarity
Craftsman riding lawn tractors typically use the standard BCI Group U1 battery size. In our comparison, the Weize listing states dimensions of 7.68 by 5.12 by 7.1 inches, while the Mighty Max listing states 7.62 by 5.00 by 7.00 inches. Terminal layout is critical: both listings feature left-positive orientation with nut-and-bolt terminal connections. Installing a battery with reversed terminals can prevent cables from reaching the posts or damage the electrical harness.
Cold Cranking Amps and starter performance
Cold Cranking Amps (CCA) measure a battery’s starting power. For Craftsman lawn tractors and riders, the Mighty Max provides 200CCA from sealed lead-acid cells, while the Weize lithium iron phosphate battery provides 480CCA. Higher cranking amperage spins the starter motor more vigorously, facilitating quick starts in cold weather.
Lithium vs lead-acid and Ni-MH chemistry
Lead-acid batteries, such as sealed AGM units, provide proven starting reliability but carry higher weight, with the Mighty Max listed at 12.9 pounds. In contrast, the Weize lithium iron phosphate starter battery lists a weight of 5.84 pounds in its bullets. For cordless push mowers, lithium-ion packs provide lighter weight and steady power compared to older nickel-metal hydride (Ni-MH) packs.
Voltage and Craftsman platform compatibility
For cordless push mowers, always verify your tool platform. Modern cordless equipment from Craftsman uses the V20 battery system. These 20-volt packs are not compatible with older Craftsman 19.2V C3 tools or the discontinued Bolt-On series. If you maintain legacy C3 equipment, dedicated 19.2-volt replacement packs keep your tools running without replacing chargers.
Off-season maintenance and charging
Proper storage prevents premature battery failure. For riding mower batteries, disconnect the negative terminal or connect a quality battery charger with maintainer mode during the winter. For cordless packs, store them indoors in a temperature-controlled area away from freezing temperatures and extreme heat, as recommended by manufacturers. For more maintenance practices, explore our mower maintenance section.
Lawn size, deck width and speed in; minutes per mow out. Or work backward from the time you want to spend.
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 evaluates each battery across five criteria: performance (cranking power and amp-hour capacity), build quality (casing durability and listing accuracy), value (specifications relative to package count), safety (stated protections or certifications), and warranty (published term length and clarity).
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| WEIZE 12.8V 12Ah U1 | 9.6 | 33 | 21 | 22 | 0 | 4 |
| Mighty Max ML-U1 12V | 9.5 | 28 | 20 | 20 | 0 | 2 |
| TenHutt 20V 6.0Ah 2-Pk | 9.4 | 28 | 18 | 21 | 0 | 2 |
| Craftsman V20 4Ah 2-Pk | 9.4 | 30 | 22 | 19 | 0 | 0 |
| Enermall 19.2V C3 2-Pk | 9.3 | 26 | 16 | 19 | 0 | 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
Are battery lawn mowers any good?
Cordless battery mowers provide quiet operation, no exhaust emissions, and push-button starting without oil changes or spark plug maintenance. Modern 20-volt multi-pack setups offer convenient runtime for residential mowing, though larger properties remain better served by gas riding tractors.
How much is a lawn mower battery?
Battery costs vary widely by chemistry and category. Traditional 12-volt lead-acid Group U1 starter batteries represent an economical replacement option, whereas advanced LiFePO4 starter batteries require a higher upfront investment offset by longer cycle life. For cordless push mowers, replacement packs with higher amp-hour capacity represent a higher tier than standard capacity packs.
How to remove a lawn mower battery?
Ensure the mower engine is off and the key is removed. On a riding mower, locate the battery under the seat or hood, disconnect the black negative cable first to prevent electrical shorts, then disconnect the red positive cable. Unfasten any hold-down brackets and lift the battery out upright. For cordless mowers, press the release latch and slide the pack out of its housing.
What size battery for riding lawn mower?
Most Craftsman riding mowers and lawn tractors use a BCI Group U1 battery. In this group, the Weize listing publishes dimensions of 7.68 inches long, 5.12 inches wide, and 7.1 inches total height, while the Mighty Max lists 7.62 inches long, 5.00 inches wide, and 7.00 inches high. Always confirm whether your tractor requires left-positive terminal orientation before selecting a replacement.
How to choose a battery lawn mower battery replacement?
Match the battery type to your specific equipment. For a lawn tractor, select a 12-volt Group U1 battery with at least 200 Cold Cranking Amps and verified terminal polarity. For a cordless push mower, confirm the exact system voltage and choose an amp-hour rating that delivers the mowing coverage you need.
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Explore our mower maintenance section to keep your riding tractors and cordless equipment running reliably throughout the season.
