ETX20L Powersport Batteries
Sealed 12V AGM and lithium replacement batteries for motorcycles, ATVs, UTVs, snowmobiles, and personal watercraft. Built for riders who need dependable starting power, low-maintenance convenience, and off-season storage confidence.
ETX20L Cross-Reference Guide
Searching by a different battery code? The ETX20L replaces and cross-references with these common fitment numbers. Always confirm terminal layout, polarity, and dimensions before ordering.
Sealed AGM Batteries
Deka original and compatible AGM replacements — proven reliability for motorcycles, ATVs, UTVs, snowmobiles, and watercraft

Deka Power Sports ETX20L Battery
The OEM standard. Factory sealed AGM by East Penn Manufacturing — 310 CCA, 18Ah, calcium/calcium grid technology, and patented terminal design for dependable powersport starting power.
12V · 18Ah · 310 CCA · 6 cells · 3.44×6.88×6.13"
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Weize YTX20L-BS Sealed AGM
Maintenance-free sealed AGM with 300 CCA and 18Ah capacity. Spill-proof design for motorcycles, ATVs, UTVs, and snowmobiles with broad ETX20L replacement compatibility.
12V · 18Ah · 300 CCA · 12.8 lbs · 6.89×3.43×6.1"
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UPLUS EB20H-3 / YTX20HL-BS AGM
High-performance sealed AGM compatible with Yamaha, Honda, Suzuki, Harley-Davidson, Kawasaki, and Jet Ski applications. PP material housing for better heat resistance and 5+ year design life.
12V · 18Ah · 310 CCA · 13.1 lbs · 6.89×3.43×6.1"
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Mighty Max YTX20L-BS AGM
Rechargeable sealed lead acid AGM with 270 CCA. Weatherproof reliability, built for heavy-duty electrical loads, consistent power in high and low temperatures.
12V · 18Ah · 270 CCA · 6 cells · 6.88×3.50×6.13"
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Mighty Max YTX20L-BS Gel Battery
Factory activated gel battery for Sea-Doo and marine applications. True deep cycle design, environment-friendly, zero fumes — ideal where sealed construction and reserve capacity matter most.
12V · 18Ah · 270 CCA · 6 cells · 6.88×3.42×6.10"
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AJC Battery Compatible with Big Crank ETX20L
Direct powersports replacement with rugged construction for on- and off-road use. Increased capacity delivers strong cranking power with broad cross-reference coverage.
12V · 20Ah · 270 CCA · 12.05 lbs
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SigmasTek Deka ETX20L Replacement
AGM replacement with extreme freeze, heat, and vibration resistance. Superior starting power and deep cycle capacity — ships fully charged and ready to install.
12V · 20Ah · 310 CCA · 11 lbs · 6.89×3.43×6.14"
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Energizer TX20HL AGM
Strong, reliable power for high-performance engines. Permanently sealed, maintenance-free AGM with non-spillable design. Fits Harley-Davidson, Honda, Polaris, Yamaha, Arctic Cat, and more.
12V · 18Ah · 310 CCA · 12 lbs · 6.89×3.43×6.1"
Shop NowLithium ETX20L Alternatives
LiFePO4 replacements for lighter weight, higher cranking output, and modern battery performance

TYKOOL LFP20L-BS Lithium Battery
LiFePO4 replacement with 480 CCA and integrated LCD digital readout for instant system health checks. IP66 rated, flame-retardant ABS housing. Just 3.3 lbs — a fraction of lead-acid weight.
12V · 8Ah · 480 CCA · 3.3 lbs · 6.9×3.42×6.1"
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12V 10Ah 800A LiFePO4 YTX20L-BS
High-cranking lithium replacement with built-in BMS protection. 1/3 the weight of lead-acid, 5x faster starts, 2,000+ deep cycles. Compatible with motorcycles, ATVs, jet skis, and generators.
12.8V · 10Ah · 800A · 3.7 lbs · 6.89×3.43×6.1"
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AMPXELL YTX20L-BS Lithium
Stacking li-po cell design with low internal resistance and stable voltage. Excellent low-temperature performance from -4°F to 140°F. Quad terminal and universal spacer for broad compatibility.
12.8V · 12Ah · 720A · 6.1×3.43×6.89"
Shop NowThe Deka ETX20L Standard
The Deka ETX20L comes from East Penn Manufacturing, one of the largest single-site battery manufacturers in the world, headquartered in Lyon Station, Pennsylvania. East Penn produces batteries for automotive, marine, industrial, telecommunications, and power sports markets — the Deka Power Sports AGM line is built on that same industrial-grade foundation with advanced calcium/calcium grid technology for strong cranking power and reduced self-discharge.
What defines the ETX20L category is versatility. With 18Ah of capacity and up to 310 CCA, this battery size serves a wide range of power sports machines — from Harley-Davidson cruisers and sport bikes to ATVs, UTVs, snowmobiles, and personal watercraft. Buyers searching for an ETX20L equivalent or YTX20L-BS replacement are typically looking for a direct-fit battery that delivers reliable starting power without compromise.
The ETX20L format also includes lithium LiFePO4 alternatives for riders who prioritize lighter weight and higher cranking output. Whether the priority is premium AGM reliability from Deka and Energizer, value-focused replacements from Weize and Mighty Max, or performance-oriented lithium upgrades, the ETX20L category gives power sports owners real options for every machine and every budget.
Manufacturer
East Penn Manufacturing Co.
Lyon Station, Pennsylvania
Battery Design
- Sealed AGM, factory charged
- 6-cell lead-acid construction
- 18Ah capacity, up to 310 CCA
- Low self-discharge for seasonal storage
- Patented terminal design
Markets Served
Automotive, Marine, Industrial, Telecom, Power Sports
Built for Machines That Sit Between Seasons
Motorcycles, snowmobiles, personal watercraft, ATVs, and UTVs can sit for months. The ETX20L battery is designed to handle that reality.
Off-Season Storage
Low self-discharge AGM chemistry means the ETX20L retains charge longer than conventional batteries. Pair it with a trickle charger for extended storage, and it will be ready when riding season returns.
Cold-Weather Starts
Up to 310 CCA across the AGM lineup, with lithium options reaching 800A. Whether it is a cold garage start on a Harley, a snowmobile in subzero weather, or a spring ride on a cruiser, the ETX20L delivers the cranking power these engines demand.
Install and Forget
No acid filling, no vent tubes, no water level checks. Factory-sealed construction means you install it once and ride. That is especially valuable for owners who maintain multiple machines or seasonal vehicles.
What Buyers Are Saying






The battery was fully charged and was delivered the day after it was ordered. Bike is operating great.
I was amazed that the seller shipped within a few hours of my order. The shipment came packaged well and it was exactly what I ordered. I think Deka batteries are the best for my Harley and my Big Dog chopper. They work great and don't let me down. I have ordered and used them for years.
I got this for a replacement for the Bosch battery in my airplane. Effectively the same size and weight, it went right in, then the engine kicked over on the first try. For about $130, it can't be beat.
The Deka battery fit like a glove in my 08 Harley Davidson FXSTC. It is the exact same dimensions as the Harley Battery and has the same specifications but at about $60 less. In doing my research, Deka makes batteries for many "companies" who put their logo on them. My previous battery was 6 years old and probably lost a cell. With this battery the bike did not hesitate to fire up. Shipping was fast and when I put the Deka on the 3 AMP Battery Tender, it read over 80% charge and was topped off in about half an hour.
Great purchase. I purchased this battery 5 years ago the exact same model and with the use of a battery tender I had 5 years of maintenance free service. In Florida five years is an exceptional service time with our heat! This battery fits a 2009 Harley Davidson V-Rod Muscle perfectly. I definitely recommend purchasing this battery because it is fluid sealed, and completely maintenance free.
Excellent 12 Volt, 18 Ah, 310 CCA Battery for my Honda Gold Wing GL1800. The first one I just tossed out lasted 7-Years, and I must say, seven years ago it was $60 bucks cheaper, but overall this has been the best MC Battery I've ever owned. Here's hoping for another flawless seven years!
ETX20L Battery Comparison
Side-by-side specs for AGM and lithium ETX20L batteries — voltage, capacity, chemistry, CCA, weight, and dimensions.
| Battery | Type | Capacity | CCA | Weight | Dimensions |
|---|---|---|---|---|---|
| Deka ETX20L | AGM | 18 Ah | 310 | ~13 lbs | 6.88 × 3.44 × 6.13 in |
| Weize YTX20L-BS | AGM | 18 Ah | 300 | 12.8 lbs | 6.89 × 3.43 × 6.1 in |
| UPLUS EB20H-3 | AGM | 18 Ah | 310 | 13.1 lbs | 6.89 × 3.43 × 6.1 in |
| Mighty Max YTX20L-BS | AGM | 18 Ah | 270 | — | 6.88 × 3.50 × 6.13 in |
| Energizer TX20HL | AGM | 18 Ah | 310 | 13.67 lbs | 6.89 × 3.43 × 6.1 in |
| SigmasTek STX20HL-BS | AGM | 20 Ah | 310 | 11 lbs | 6.89 × 3.43 × 6.14 in |
| TYKOOL LFP20L-BS | LiFePO4 | 8 Ah | 480 | 3.3 lbs | 6.9 × 3.42 × 6.1 in |
| Forgetyo LiFePO4 | LiFePO4 | 10 Ah | 800A | 3.7 lbs | 6.89 × 3.43 × 6.1 in |
| AMPXELL YTX20L-BS | LiFePO4 | 12 Ah | 720A | — | 6.1 × 3.43 × 6.89 in |
Find the Right ETX20L for Your Machine
Deka original, compatible AGM replacements, and lithium alternatives — 11 verified options, real specs, ready to ship.
Shop NowCompatibility and Use Cases
The ETX20L battery size is used across a wide range of power sports and utility applications. Buyers in this segment ride motorcycles, operate ATVs and UTVs, or depend on snowmobiles and watercraft that require reliable starting power.
Motorcycles
Harley-Davidson Softail, Fat Boy, V-Rod, Heritage Softail Classic, Night Train, Honda Gold Wing GL1800, and other cruisers and touring bikes that use the ETX20L or YTX20L-BS form factor.
ATVs & UTVs
Polaris Sportsman 570, Ranger 500, Honda TRX680 FourTrax Rincon, Yamaha Kodiak, Grizzly, and other utility and recreational vehicles that need dependable ETX20L-compatible batteries.
Personal Watercraft
Sea-Doo GTX, GTI, RXP, RXT series and other jet skis where sealed, vibration-resistant, spill-proof construction is essential for on-water reliability and safety.
Snowmobiles
Arctic Cat, Polaris, BRP, and Yamaha snowmobiles that demand high CCA for subzero cranking power and a battery that holds charge through long off-season storage periods.
Generators & Utility Equipment
Tractors, riding lawn mowers, generators, and other utility applications where the YTX20L-BS format provides reliable sealed starting power for seasonal and daily-use equipment.
Frequently Asked Questions
An ETX20L battery is a 12-volt power sports battery size commonly used in motorcycles, ATVs, UTVs, snowmobiles, personal watercraft, and similar equipment. It is known for strong starting performance, sealed construction in AGM versions, and compatibility with a wide range of replacement applications.
ETX20L batteries are commonly used in larger motorcycles, touring bikes, cruisers, ATVs, side-by-sides, snowmobiles, jet skis, and other power sports machines that require dependable cold cranking power and compact replacement sizing.
AGM batteries are popular because they are factory sealed, maintenance-free, spill-resistant, and designed for reliable starting performance. They also handle vibration well and typically offer lower self-discharge during storage than traditional flooded batteries.
These designations are often used in the same replacement category, and many products are marketed as compatible across ETX20L and YTX20L-BS applications. The most important factor is always checking fitment, polarity, dimensions, and manufacturer compatibility for the specific vehicle.
Deka is part of East Penn Manufacturing, a long-established battery manufacturer known for producing batteries for automotive, marine, commercial, industrial, stationary, and power sports markets. The Deka Power Sports AGM line was introduced as a premium-quality sealed battery range built for durability, performance, and leakproof operation.
East Penn Manufacturing is a major American battery manufacturer with a long reputation for producing lead-acid batteries and accessories across multiple industries. The company supplies products for automotive, telecommunications, marine, industrial, commercial, and power sports applications, with a strong emphasis on quality manufacturing systems.
The Deka ETX20L battery is built around premium AGM technology, factory-sealed construction, strong cranking output, and low-maintenance ownership. It is designed for dependable starting, durable performance under vibration, and better storage readiness during off-season periods.
Yes. The Deka Power Sports AGM line was introduced as fully charged and factory sealed, which means there is no dry filling, acid activation, or vent tube setup required before installation.
Sealed AGM construction reduces maintenance, prevents spills under normal use, eliminates the need for vent tubes in many applications, and offers a cleaner, simpler installation experience. It is especially useful for riders and owners who want consistent performance with less upkeep.
Cold cranking performance refers to the battery's ability to deliver enough power to start an engine, especially in lower temperatures. In power sports applications, this matters because cold starts, seasonal weather, and high-compression engines can place extra demand on the battery.
Yes. In addition to AGM options, the ETX20L replacement category also includes lithium batteries, including LiFePO4 models. These products are typically chosen by customers looking for lighter weight, faster starting response, or higher advertised cranking output.
That depends on the application and the owner's priorities. AGM batteries are a proven, dependable, cost-effective choice for direct replacement use. Lithium batteries are often chosen for weight savings and higher-performance output, but buyers should always confirm charging system compatibility and intended use before upgrading.
The most important checks are vehicle fitment, terminal orientation, polarity, battery dimensions, and the replacement code recommended for the machine. It is also worth comparing amp-hour rating, cold cranking output, chemistry type, and intended use, especially for seasonal or cold-weather equipment.
A quality AGM ETX20L battery is well suited to seasonal equipment because it offers lower self-discharge and sealed construction, which helps reduce maintenance during storage. This is especially useful for snowmobiles, motorcycles, personal watercraft, and other machines that may sit unused for part of the year.
The ETX20L selection includes premium AGM batteries such as the Deka ETX20L, value-oriented sealed AGM replacements, gel alternatives for certain applications, and lithium replacement options for customers who want a lighter, higher-output setup. This makes it easier to choose the right battery based on machine type, budget, and performance goals.
Need a Different Battery Size?
These dedicated stores cover other popular powersport battery formats with the same focused approach.
ETX-30LA Battery
Heavy-duty 30Ah AGM for touring motorcycles, Harleys, and large UTVs
ETX-15L Battery
Compact AGM options for mid-size motorcycles, ATVs, and scooters
YTZ10S Battery
Compact 12V for sport bikes, scooters, and commuters
YTZ12S Battery
Mid-to-large displacement motorcycles and touring bikes
YTZ5S Battery
Honda Grom, small-displacement motorcycles, and scooters