MADE IN THE USA!
Free Economy ShippingProduct Specifications for EarthX ETX12A Lithium Powersports Battery
| BM Part #: | LTX12A |
|---|---|
| Brand: | EarthX |
| Made In: | U.S.A. |
| Voltage: | 13.2 Volt |
| Cold Cranking Amps: | 135 CCA / 220 PCA |
| Capacity: | 4 Ah |
| Energy Capacity: | 52.8 Wh |
| Type: | LiFePO4 |
| Length: | 4.5" |
| Width: | 2.6" |
| Height: | 3.7" |
| Shipping Weight: | 1.30Lbs |
| Warranty: | 2 Year Factory Direct |
| Product Manual: | Download |
| Datasheet: | Download |
What's in the box:
- 1 x ETX12A
- 2 x 6mm screws
- Foam for proper fitment
- Made in the USA. Why it matters:
- Superior craftsmanship; rigorously tested; high-quality parts.
- Full Battery Management System (BMS): Automatically protects against over-discharge, overcharge, short circuit, and heat damage.
- 220 Peak Cranking Amps: Delivers strong, reliable engine starts for motorcycles, dirt bikes, and powersports.
- Featherweight Design: At just 1.3 lbs, it's up to 80% lighter than a comparable lead-acid battery.
- LiFePO4 Chemistry: Lithium iron phosphate cells rated for far more charge cycles than conventional lead-acid chemistry.
- 2-Year Non-Prorated Warranty: Backed by EarthX's factory direct warranty for genuine peace of mind.
- Made in the USA: Engineered and assembled domestically with rigorously tested, high-quality components.
Product Description
Are you tired of replacing a heavy lead-acid battery every few seasons? The EarthX ETX12A is a lithium iron phosphate (LiFePO4) powersports battery designed to trade out the bulk and the maintenance headaches for something better: confident, reliable starts every time you hit the button.
At just 1.3 lbs and measuring 4.5" L x 2.6" W x 3.7" H, this compact battery punches well above its size with 135 Cold Cranking Amps and 220 Peak Cranking Amps. It's a direct fit for dozens of applications and a popular upgrade for modern dirt bikes from KTM, Husqvarna, Honda, Kawasaki, and Beta.
Why the Built-In BMS Changes Everything
Many lithium batteries look similar on paper but fail in the field because they lack real cell protection. The ETX12A includes EarthX's fully integrated Battery Management System (BMS), which actively monitors and shields the battery from the issues that quietly kill other brands:
- Over-discharge — the number-one silent killer of lithium batteries
- Overcharge and short circuit events
- Heat damage from excessive cranking
- Cell imbalance, corrected automatically in real time
No special balancing charger is required. The battery handles itself, even if you accidentally leave your master switch on.
A Long-Term Investment in Your Ride
Lead-acid batteries average around 350 charge cycles before performance falls off, meaning you're likely replacing one every two to three years. The ETX12A's LiFePO4 chemistry is rated for up to 4,000 cycles. That's the kind of math that makes a premium battery pay for itself over time — and it's backed by a full, non-prorated factory warranty direct from EarthX.
Fitment and Terminal Notes
The ETX12A ships with two 6mm mounting screws and foam padding for proper fitment. Some motorcycle applications require the EarthX Terminal Adapter Kit (Adapter-ABF) for front or side cable routing. We carry it right here at Battery Mart — add it to your order before you check out to make sure you have everything you need on day one.
Ready to stop thinking about your battery? The ETX12A is engineered, assembled, and warranted in the U.S.A. Order today with free standard shipping to the contiguous 48 states.
Typical Charging Times
| Charging Amps | Charging Time |
| 1 amp | 4 hours |
| 3 amp | 1.5 hours |
| 5 amp | 45 min. |
Frequently Asked Questions
What is the difference between the ETX12A and the ETZ5G?
A: Both are EarthX lithium batteries for powersports, but they're built for different priorities. The ETX12A weighs 1.3 lbs and measures 4.5" x 2.6" x 3.7", with 135 CCA, 220 PCA, and 4.0 Ah capacity. It includes the full Battery Management System, which covers over-discharge protection and excessive cranking protection, and comes with a 2-year warranty. The ETZ5G is lighter at 0.9 lbs, with slightly higher cranking at 140 CCA and 240 PCA, but 3.4 Ah capacity. Its BMS omits over-discharge and excessive cranking protection — which means it won't cut off during demanding cold-weather starts. That trade-off makes the ETZ5G a better fit for extreme cold cranking situations, while the ETX12A is the better all-around choice for general powersports use. The ETZ5G carries a 1-year warranty. See the ETZ5G here.
Will the ETX12A fit my motorcycle or dirt bike?
A: The ETX12A uses an A-case form factor (4.5" L x 2.6" W x 3.7" H) and replaces a wide range of common part numbers, including YTX5L-BS, YTX7L-BS, YTX7A-BS, YTZ7S, YTZ8V, YB7-A, YB7L-B, and YB7C-A. It's a popular direct replacement for 2017 and newer dirt bikes from KTM, Husqvarna, Honda, Kawasaki, and Beta. If your bike uses a top-post or side-post cable configuration, you may need the EarthX Terminal Adapter Kit (Adapter-ABF), which we carry here. Check the full cross-reference list on this page to confirm compatibility before ordering.
Do I need a special charger for this battery?
A: The ETX12A is compatible with most modern smart chargers and works with chargers labeled for lead-acid batteries, thanks to the built-in BMS handling cell balancing automatically. For best results, use a charger that supports LiFePO4 (lithium iron phosphate) chemistry. Avoid older chargers with an automatic desulfation or reconditioning mode, as these can push voltage beyond safe limits. No dedicated lithium balancing charger is required.
How does the ETX12A handle cold weather?
A: Like any LiFePO4 battery, the ETX12A may see some reduction in available cranking capacity in very cold temperatures — but it will not freeze or crack the way a lead-acid battery can. The full BMS does include excessive cranking protection, which in rare cases may trigger during a prolonged cold-weather start. If you regularly ride in freezing conditions or are building a snow bike, the ETZ5G is specifically designed for cold-weather cranking without that cutoff. EarthX also publishes detailed cold-temperature operation guidance on their website.
What's in the box, and do I need to buy anything else?
A: The ETX12A ships with the battery, two 6mm mounting screws, and foam padding for proper fitment in the battery compartment. Terminal adapters are not included. Depending on how your cables route, you may need the Adapter-ABF Terminal Adapter Kit for front or side cable mounting. We carry it here at Battery Mart and you can add it to your order at checkout.
Cross Reference & Compatibility
Customer Reviews
I'm using the ETX12A as an auxiliary battery in my helicopter. It saves about 4 lb. over the old lead acid battery I used to use, and has higher amp-hour capacity. Highly recommended.
It worked great right off the bat. I use it for starting a Hayabusa-powered racecar without an alternator hookup for it.
My second earthx battery for my Sportbikes.
Great product,fast delivery and top notch customer service, thanks Team!
Not an exact fit for my motorcycle but it still managed to fit. Definitely needed the terminal adapter kit. Only issue I had so far is the terminal screws were a bigger diameter than my bike leads. Nothing a drill bit cant fix...
it works great , starts fast
weights nothing, replaced a lithium ion battery that didn't work in cold weather. every sat when I go to ride the earth x is dead ? once i jump start the bike its good all day by about Tues its dead again, muli meter doesn't show a short, what ever. a little pricey for not doing the job.
The cranking power of this thing is on another level. Touch the start button and boom. Wow this battery is great. Worth every penny. Make sure to buy the side post conversion kit. It is a must for most motorcycles.
