Free Economy ShippingProduct Specifications for Shorai LFM14L2-BS12 Lithium-Iron Powersport Battery with BMS
| BM Part #: | LFM14L2-BS12 |
|---|---|
| Battery Polarity: |
|
| Voltage: | 13.2 Volt |
| Cold Cranking Amps: | 210 CCA |
| Capacity: | 4 Ah |
| Energy Capacity: | 52.8 Wh |
| Type: | Lithium Iron |
| Length: | 4.45" |
| Width: | 2.28" |
| Height: | 3.50" |
| Shipping Weight: | 1.61Lbs |
| Warranty: | 1 Year Free | 5 Year Prorated Factory Direct |
- Ultra-Lightweight at 1.61 lbs: Dramatically lighter than lead-acid equivalents, freeing up weight and space on your powersport build.
- 210 Cold Cranking Amps: Delivers strong, reliable starting power across a wide range of motorcycles, ATVs, and powersport vehicles.
- Integrated Sentry BMS: Built-in Battery Management System automatically prevents deep discharge — protecting the battery from one of the most common failure points.
- LiFePO4 Chemistry: Contains no lead, no acid, and produces no explosive gases during charging — safer and far more environmentally friendly than traditional batteries.
- Drop-In Fitment — Shims Included: Foam shims, terminal screws, and spares are included in the box for a clean, secure installation in most battery trays.
- 5-Year Prorated Warranty: Backed by Shorai's 1-year full warranty and 5-year prorated factory-direct coverage, purchased direct through Battery Mart.
Product Description
Tired of a lead-acid battery that drains itself sitting in the garage all winter — or one that takes up more real estate than it should? The Shorai LFM14L2-BS12 is the current-generation replacement for the popular LFX14L2-BS12, now upgraded with an integrated Battery Management System. It weighs just 1.61 lbs and delivers 210 cold cranking amps in a package the size of a paperback book.
That's not a typo. This is a serious starting battery that happens to weigh less than most people's wallets after a trip to the parts store.
Why Lead-Acid Can't Compete
Lead-acid batteries degrade whether you use them or not. Sulfation, slow self-discharge, and sensitivity to deep discharge are all built into the chemistry. Shorai's LiFePO4 (Lithium Iron Phosphate) cells work differently:
- No sulfation during storage — it won't punish you for leaving the bike parked
- Extremely low self-discharge rate — holds charge far longer between rides
- No lead, no acid, and no explosive gases during charging
- 2–4x the service life of a comparable lead-acid battery
The result is a battery that's ready to start when you are, even if "when you are" turns out to be six months from now.
Big Power, Tiny Footprint
At 4.45" x 2.28" x 3.50", this battery frees up serious space in your battery tray. Riders have used that extra room to tuck in HID ballasts, GPS units, and other accessories that wouldn't fit before. Whether you're building a tight street tracker or just upgrading your adventure bike, the compact footprint is a genuine advantage — not just a spec sheet number.
Protected by the Sentry BMS
Every LFM series battery includes Shorai's built-in Sentry Battery Management System. The BMS monitors the battery and steps in before a deep discharge can do permanent damage. That's one of the most common ways lithium powersport batteries fail prematurely, and this one handles it automatically. You get more reliable starts, more riding seasons, and less babysitting.
Installation Is Straightforward
The LFM14L2-BS12 is a drop-in replacement for most powersport battery trays. High-density foam shims are included so you can fine-tune the fit even if your tray runs a little large. Terminal screws and spares come in the box too. Cable connections work at the top or sides of the terminals — no adapter kits, no rewiring needed.
This is the "L" polarity configuration (negative terminal on the left), Case Type 2 fitment. It replaces OEM batteries including the YTX7L-BS, YB10L-B, YB10L-B2, YB9L-B, YTZ7S, and YTZ8V, among others. Use Shorai's fitment guide or Battery Mart's vehicle lookup to confirm compatibility with your year, make, and model before ordering.
Order today and get free standard shipping to the contiguous 48 states — direct from Battery Mart, an authorized Shorai dealer.
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
Is the LFM14L2-BS12 the same as the LFX14L2-BS12?
A: Yes — the LFM14L2-BS12 is Shorai's direct replacement for the older LFX14L2-BS12. The LFM series carries the same fitment and capacity but adds the integrated Sentry Battery Management System. If you've been searching for the LFX14L2-BS12, this is the current version you want.
Will this battery fit my motorcycle or powersport vehicle?
A: The LFM14L2-BS12 uses "L" polarity (negative terminal on the left) in a Case Type 2 footprint (4.45" x 2.28" x 3.50"). It replaces a wide range of OEM batteries including the YTX7L-BS, YB10L-B, YB10L-B2, YB9L-B, YTZ7S, and YTZ8V. Use Shorai's online fitment tool or Battery Mart's vehicle lookup to confirm compatibility for your specific year, make, and model before ordering.
Can I charge this with my existing lead-acid battery charger?
A: Most standard chargers are compatible, but there's one important exception: do not use any charger with an automatic desulfation mode that cannot be turned off — that mode can damage a lithium battery. Your bike's stock charging system works fine as long as it outputs at least 13.1V at idle and doesn't exceed 15.2V at full output. For storage charging, a lithium-compatible smart charger is the safest option.
Does the battery arrive ready to use?
A: No — lithium batteries are required by shipping regulations to arrive at approximately 30% charge. You'll need to charge the battery fully before first use. A lithium-compatible charger is recommended for that initial charge.
How does this battery perform in cold weather?
A: Lithium batteries can take slightly longer to reach peak output in very cold temperatures compared to lead-acid. Most riders in moderate climates report no issues. If you're regularly starting in freezing or sub-freezing conditions, it's worth knowing that a brief warm-up period may help, and a lithium-compatible battery tender during the off-season is a good practice.
Cross Reference & Compatibility
Customer Reviews
I really like the size of the battery. It's really light and compact and it comes included with foam pieces that you could stick into the battery box that allows the battery to be secured in place.
Battery is lite weight, came with clear operational instructions and plenty of various fitment pads to keep it from shifting in the Battery box. So far the unit has great output for turning over the old Rotax
Just as a test when my GMC V6 4.3 liter 800 amp battery died, I wanted to see what this tiny battery would do.
I didn't even disconnect the old dead battery......just jumper cables. BOOOM !! The V6 engine started. No cranking.....just BOOM !
Awesome battery. Lightweight and great fix.
Adventure motorcycle starts hard when cold. With the Shori batteries it has been no problem starting them.
I needed more space under the seat of my motorcycle to place HID ballasts. This battery is small enough to make that happen.
This is an outstanding product I would highly recommend to anyone.
