Free Economy ShippingProduct Specifications for Shorai LFM19A4-BS12 Lithium-Iron Powersport Battery with BMS
| BM Part #: | LFM19A4-BS12 |
|---|---|
| Battery Polarity: |
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| Voltage: | 13.2 Volt |
| Cold Cranking Amps: | 285 CCA |
| Capacity: | 6.4 Ah |
| Energy Capacity: | 84.5 Wh |
| Type: | Lithium Iron |
| Length: | 5.83" |
| Width: | 3.39" |
| Height: | 3.46" |
| Shipping Weight: | 2.31Lbs |
| Warranty: | 1 Year Free | 5 Year Prorated Factory Direct |
- Built-In BMS Over-Discharge Protection: The Sentry Battery Management System monitors voltage and disconnects terminals before excessive discharge can cause permanent damage.
- 285 Cold-Cranking Amps: Delivers strong, reliable starts even when temperatures dip, so your morning ride or track day never gets delayed at the key.
- Weighs Just 2.31 Lbs: Swap out your heavy lead-acid battery and instantly shave pounds off your bike for improved handling and agility.
- Two to Four Times the Service Life: LiFePO4 chemistry resists sulfation, giving this battery a significantly longer lifespan than conventional lead-acid replacements.
- No Hazardous Materials: Contains no lead, acid, or explosive gases, making it safer to handle and more environmentally friendly than traditional batteries.
- Drop-In Ready with Foam Shims Included: Fits where your OEM battery sat, with adhesive foam shims included to ensure a snug, rattle-free fit in the battery box.
Product Description
Experience the Best with the Shorai LFM19A4-BS12
Whether it's a slow crank on a cold morning or a completely dead cell you discovered after a winter in the garage, the Shorai LFM19A4-BS12 is built to do better. Sport bike and performance motorcycle riders have made this one of Shorai's most popular models. It's a common upgrade on the Honda CBR1000RR, Yamaha YZF-R6, and Aprilia RSV4, where trimming weight from the battery bay translates directly into sharper handling and feel. It's also a go-to for BMW S1000RR owners looking for a factory-quality lithium upgrade that installs without any modifications.
Easy Installation, No Rewiring Required
The LFM19A4-BS12 directly replaces batteries in the YTX12-BS, YTX9-BS, YTZ10S, YTZ12S, and YTZ14S group. Your existing charging system needs no modifications. Included foam shims fill any extra space in the battery box for a firm, secure fit. Most standard lead-acid chargers and tenders are compatible; just confirm that any automatic desulfation mode can be turned off before connecting.
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 the date of purchase within the USA, as follows:
*Please note: 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.
Frequently Asked Questions
What's the difference between the LFM19A4-BS12 and the old LFX19A4-BS12?
A: They're functionally the same battery. In October 2024, Shorai changed the part number prefix from LFX to LFM to clearly identify batteries equipped with the built-in Battery Management System (BMS). The cells, case dimensions, voltage, and CCA ratings are all identical between the two designations. If you've been searching for the LFX19A4-BS12, the LFM19A4-BS12 is its direct replacement.
What’s the difference between the "equivalent" and "Actual" amp-hour capacity?
A: The actual amp-hour rating reflects the battery’s physical cell capacity, while the equivalent, or PbEq, rating shows how its usable performance compares to a traditional lead-acid battery. Because lithium batteries can use more of their capacity without losing cranking power, the usable capacity of an LFM18 12V battery is very close to that of an 18Ah-rated lead-acid battery.
How does the Shorai LFM19A4-BS12 battery perform in cold weather?
A: The LFM19A4-BS12 can perform well in cold temperatures, but we recommend warming it up before starting. In colder weather, turn on the headlights or another electrical accessory briefly before cranking. This draws current through the battery and can improve starting performance. Keeping the battery fully charged during storage will also help with cold-weather starts.
Is this battery compatible with my existing charger or battery tender?
A: Yes, in most cases. The LFM19A4-BS12 works with standard lead-acid chargers and tenders, with one important exception: if your charger has an automatic desulfation or "reconditioning" mode that cannot be turned off, do not use it with this battery. Battery Tender products have been confirmed compatible. When in doubt, check your charger's manual for a desulfation or repair mode setting.
What applications work best with the Shorai LFM19A4-BS12?
A: The LFM19A4-BS12 battery is designed to replace lead-acid batteries in a wide range of powersports vehicles, including:
Can the LFM19A4-BS12 be mounted in any position?
A: Yes. Because this battery contains no liquid electrolyte, it can be safely mounted in any orientation without risk of spillage. This makes it particularly well-suited for custom builds, dirt bikes, and any application where the battery box orientation isn't strictly upright.
Cross Reference & Compatibility
Customer Reviews
Excellent customer support!
I ordered the Shorai LFM19A4-BS12 to replace the standard lead-acid battery in my 2014 VFR 800. The 19A4 was a perfect fit for the battery compartment with the same length and width, but is slightly shorter than the original. The height difference can be adjusted with foam inserts that come with the battery.
This is my third Shorai lithium battery and all three are still working. I've had the oldest for about 5 years. They will last a long time as long as you never run them completely down. If you are not going to ride for a long time, either put them on a Shorai battery tender (battery tender must becompatible with this type of battery) or take the battery out of the bike and store in a cool, dry place. Li-ion batteries can sit uncharged for extended periods as long as there is no draw on them.
Based on my previous Shorai batteries, I bought this even though it was 3x more than the cheapest lead-acid alternative. It is 1/3 the weight, has more cold cranking and has good reliability if properly cared for.
Battery Mart's prices were competitive and they had quick, free delivery.
After the infamous stator/rectifier meltdown on my 2003 Honda VFR800, I replaced the entire electrical system and sought an upgraded battery to complement the new setup. Based on multiple positive reviews, I ordered this particular battery, which arrived surprisingly quickly, and I was immediately struck by its significantly smaller size and lighter weight—about one-third less than its lead-acid predecessor. To ensure a perfect fit in the original battery compartment, it came with adhesive-backed foam pads that effectively took up the extra space, allowing it to fit "like a champ" with easy hook-up. So far, its cranking power and charging capacity have been excellent, and while it's a pricey investment, I'm hopeful its long-term performance will prove well worth it, though only time will truly tell.
Super fast shipping. Great seller highly recommended. Got my lithium battery for my motorcycle. Outstanding. Thanks guys.
