Free Economy ShippingProduct Specifications for Shorai LFM14A4-BS12 Lithium-Iron Powersport Battery with BMS
| BM Part #: | LFM14A4-BS12 |
|---|---|
| Battery Polarity: |
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| Voltage: | 13.2 Volt |
| Cold Cranking Amps: | 210 CCA |
| Capacity: | 4.5 Ah (14 Ah Equivalent) |
| Energy Capacity: | 59.4 Wh |
| Type: | Lithium Iron |
| Length: | 5.83" |
| Width: | 3.39" |
| Height: | 3.46" |
| Shipping Weight: | 2.25Lbs |
| Warranty: | 1 Year Free | 5 Year Prorated Factory Direct |
- Ultra-Lightweight Design: Weighs just 2.05 lbs — up to 80% lighter than comparable lead-acid batteries for noticeably better handling.
- Strong Cranking Power: Delivers 210 CCA at 13.2 volts for fast, reliable starts across a wide range of conditions.
- Built-In BMS Over-Discharge Protection: Shorai's Sentry Battery Management System actively guards the battery against the most common cause of early failure.
- Extended Service Life: LiFePO4 chemistry eliminates sulfation and lasts two to four times longer than traditional lead-acid batteries.
- Drop-In Replacement Fitment: Ships with adhesive foam shims; replaces YTX9-BS, YTZ10S, TX9, and YTX7A-BS with top or side terminal connections.
- Safe and Eco-Friendly: Contains no lead, acid, or explosive gases, making it a cleaner and safer choice for riders and the environment.
Product Description
Is your lead-acid battery literally weighing your ride down? The Shorai LFM14A4-BS12 is a lithium-iron powersport battery built for riders who want more from their machine without the extra bulk. It's dramatically lighter than the lead-acid battery it replaces, and you'll feel that difference the moment you pick it up.
Shorai's lithium iron phosphate (LiFePO4) chemistry means more cranking power on demand. This battery fires up fast, maintains a higher voltage under load than lead-acid designs, and holds a charge far longer when the bike is parked between rides.
Built-In Battery Management System
Every LFM14A4-BS12 comes equipped with Shorai's Sentry Battery Management System. The BMS protects against over-discharge, one of the most common reasons batteries fail before their time. Whether your machine sits all winter or runs year-round, the BMS is quietly doing its job to keep the battery in good health.
A Drop-In Fit for Popular Powersport Vehicles
The LFM14A4-BS12 is a proven upgrade for a wide range of performance motorcycles and powersport vehicles. Some of the most common fitments include:
- Honda CBR600RR (2003–2016)
- BMW S1000RR (2010–2012)
- Aprilia RSV4 R (2010–2011)
- Can-Am DS 450 (2008–2014)
It replaces OEM batteries including the YTX9-BS, YTZ10S, and YTX7A-BS. The package includes adhesive-backed foam shims to dial in the fit in your battery compartment, and terminal connections work from the top or the front for installation flexibility.
Built to Last, Season After Season
Shorai lithium-iron batteries outlast conventional lead-acid designs by a wide margin, and their low self-discharge rate means proper off-season storage keeps them ready for spring without intervention. The military-spec carbon fiber composite case stands up to vibration and harsh riding conditions on and off road.
Every LFM14A4-BS12 is backed by a 1-year full warranty and a 5-year prorated factory warranty handled directly by Shorai. One quick note on charging: use a lithium-compatible charger, and avoid any model with an automatic desulfation mode that cannot be disabled.
Ready to lighten up your ride and get a battery that handles the demands of serious powersport use? Order the Shorai LFM14A4-BS12 today — free standard shipping to the contiguous 48 states.
What's the difference between the "equivalent" and "Actual" amp hour capacity?
The manufacturer includes the "equivalent" (PbEq, "lead equivalent") rating to show a more apples-to-apples comparison between the lithium chemistry and the lead-acid battery that you're likely replacing.
The lead-acid capacity rating itself is based on a complete discharge at a low discharge rate. Under actual cranking conditions they will deliver considerably less than spec capacity. And because lead-acid batteries begin sulfating when only a small percentage of the capacity has been used, and their internal resistance rises as they are discharged, the actual capacity which can be used may be as little as 20% of the mfg. rating. Discharge in excess will not only damage the lead-acid battery, it may not allow proper starting as voltage sags.
For example, the Shorai LFM18 12V series have 6Ah cells internally. But, the cells are capable of 80% discharge without damage while still retaining more cranking power. As such, the usable capacity (or "reserve capacity") of an LFM18 12V battery is very close to 18Ah-rated lead acid batteries, while also providing superior cranking and huge weight reductions.
Cold Weather Performance Expectations
Down to about 20° Fahrenheit (-7°C) most users find that they can start normally on first crank. If your headlight comes on at key-ON, it is good for the batteries to flow some current before cranking in cold weather. The suggested headlight-on time before cranking depends on the temperature. If starting at 40°F/5°C, 30 seconds will help wake the battery and increase cranking performance. If at 0°F/-17°C, leave the lights on for 4~5 minutes before cranking. The result will be a better first crank, and longer battery life. If the engine fails to start on first crank, that first crank has warmed the battery, and the second attempt will be much stronger. Other accessories that can be turned on before cranking can also be used for this purpose, such as heated gear, radio, etc... Insuring that the battery is fully charged after storage also improves first-start performance in cold weather.
Warranty Terms
Shorai offers a Limited, Pro-Rated Five-Year Warranty for Shorai batteries, for defects in material and/or workmanship, pertaining to sales originating and delivered within the United States.
The warranty is divided into three periods from date of purchase within the USA, as follows:
All warranty claims for products purchased and delivered within the United States are handled directly by Shorai Service LLC. only. Battery Mart can only provide information for getting in contact with Shorai for warranty claims. See the Warranty Form for online submission of warranty claims, and to get your Return Merchandise Authorization (RMA#) assignment. Replacement batteries are to be issued by Shorai and sent directly to the customer. No dealership is authorized to issue a replacement battery without prior written authorization from Shorai.
Please do NOT return any product to Shorai without an RMA# or before Shorai has contacted you. In many cases issues can be solved prior to return.
Conditions which will void warranty
- Opening the battery case will void the warranty.
- Applications Not listed on the Shorai website product finder such as: Aircraft, Automotive, Go Karts, Motive power (Shorai as main power source, not engine starter).
- Over-voltage charging, or other error by charger or user setting of charger.
- Use in excess of cranking (CCA) specifications (incorrect use in custom vehicle, etc).
- Short circuit of main terminals or BMS port.
- Short circuit caused by improper installation.
- Improper connections to the 5-pin BMS port.
- Over-discharge (i.e. resting voltage allowed to fall below 12.8V/6.4V for Lfx 12V/6V types).
- Physical Damage to the battery occurring after purchase (impact, etc).
For custom vehicles if you have a stock motor pulled from another vehicle, then you can use our battery finder to select the battery that the motor came from as long as the starter gearing is the same. If you have any other questions, please give us a call and we will assist you.
Frequently Asked Questions
What is the difference between the LFM14A4-BS12 and the old LFX14A4-BS12?
A: These batteries are functionally identical. In mid-2022, Shorai quietly began adding an internal Battery Management System (BMS) to their LFX batteries for over-discharge protection, but didn't update the product name at that time. In October 2024, Shorai officially changed the naming convention from "LFX" to "LFM" to make BMS-equipped batteries easier to identify at a glance. The cells, case dimensions, and all electrical specifications are unchanged. If you previously used an LFX14A4-BS12, the LFM14A4-BS12 is its direct, like-for-like replacement.
What motorcycles and powersport vehicles is this battery compatible with?
A: The LFM14A4-BS12 fits a wide range of powersport vehicles and serves as a direct replacement for OEM batteries including the YTX9-BS, YTZ10S, TX9, and YTX7A-BS. Common compatible models include the Honda CBR600RR, BMW S1000RR, Aprilia RSV4 R, and Can-Am DS 450, among many others. We recommend using the Battery Finder tool on our site to confirm fitment for your specific year, make, and model before ordering.
Can I use my existing lead-acid charger or battery tender with this battery?
A: In most cases, yes. However, you must not use a charger with an automatic desulfation mode that cannot be disabled — this mode can damage lithium batteries. Deltran Battery Tender chargers have been confirmed compatible with Shorai batteries. For the best long-term results, a charger designed specifically for lithium iron phosphate (LiFePO4) chemistry is ideal.
How does this battery perform in cold weather?
A: The LFM14A4-BS12 performs well for most riders down to around 20°F. In colder temperatures, turn on your headlights or another accessory for a short time before cranking to warm the battery up. At around 40°F, about 30 seconds does the job; closer to 0°F, give it 4 to 5 minutes. This simple habit improves first-crank reliability and helps protect battery longevity in cold-weather conditions.
Cross Reference & Compatibility
Customer Reviews
It was recommended by a mechanic friend of mine, he has a Shorai battery in his motorcycle for 10 years, never skipped a beat. So I ordered this one, amazing battery, I'm a customer for life.
Item arrived safely and well packaged. Price was reasonable for the high quality item.
reat product and service
Bought this for a 2004 Honda CBR600RR after the OEM lead acid battery died after 3 years. This Shorai battery is significantly lighter, more powerful, and fits perfectly. For less money than the stock and outdated lead acid battery, this is a no-brainer.
Super Light weight battery, very happy with it. Thanks Battery Mart for providing fast service.
No other motorcycle battery brand has this much cranking power, lasts as long, and fits all bikes I own. P.S. I have this brand in 4 of my bikes. I've had one in my Harley 103 cu in. for 4 years and it cranks as good today as it did when I installed it.
Very well packaged, seems like a quality product. Very light weight. Time will tell if is was a good buy. Good for sport bikes to save weight, and improve handling.
