Shorai LFX21A6-BS12 Lithium-Iron Powersport Battery
Item #: LFX21A6-BS12   |    In Stock

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Shorai LFX21A6-BS12 Lithium-Iron Powersport Battery

Item #: LFX21A6-BS12   |  In Stock

Today's Price: $222.95
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Price: $222.95

12 Volt / 315 CCA
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1 Year Free | 5 Year Prorated Factory Direct Warranty
Brand New
100% Compatibility
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Product Specifications for Shorai LFX21A6-BS12 Lithium-Iron Powersport Battery

BM Part #: LFX21A6-BS12
Battery Polarity: Left Positive Terminals
Voltage: 12 Volt
Capacity: 7 Ah (21 Ah Equivalent)
Type: Lithium Iron
Length: 5.83"
Width: 3.23"
Height: 5.51"
Cold Cranking Amps: 315 CCA
Shipping Weight: 3.03Lbs
Warranty: 1 Year Free | 5 Year Prorated Factory Direct
  • Ultra light - The cheapest way to shave pounds off your racing motorcycle
  • Twice to four times the service life of lead-acid batteries
  • Fitted replacement for your OEM battery
  • Military spec Carbon Fiber Composite Case
  • Faster cranking for better starts
  • Super-fast recharge rate
  • SAFE! No explosive gasses during charge, no lead, no acid
  • Environmentally friendly
  • Bolt Size: 10mm bolt with 5mm threads.
  • Powersport applications only. Do not install in cars.
Frequently Bought Together:
Buy Together and Save
Shorai LFX21A6-BS12 Lithium-Iron Powersport Battery
Shorai LFX21A6-BS12 Lithium-Iron Powersport Battery
Shorai Battery Charger for 6 Volt and 12 Volt LFX Batteries
Shorai Battery Charger for 6 Volt and 12 Volt LFX Batteries
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Total for Both Items: $322.90

Product Description

Free Standard Shipping!

Order today and receive free standard shipping on your Shorai LFX21A6-BS12 Lithium-Iron Powersport Battery. Only valid in the contiguous 48 states and not valid with any other offer.

Shorai's Lithium Iron batteries are the ultimate fusion of light weight and power technologies. The LFX21A6-BS12 battery weighs in at 3.03 pounds and offers 315 CCA. These batteries will require no change to your charging systems and are a drop-in replacement for your original battery (Included shims may be required for installation).

What makes Shorai batteries different? They contain Shorai-proprietary eXtreme-Rate Lithium Iron prismatic cells (chemistry LiFEPO4). They contain no poisonous lead, no dangerous acid, and do not create explosive gases during charge, as traditional Lead-Acid batteries do. Compared to traditional batteries, Shorai lithium batteries are extremely light, have much lower self-discharge rate, do not sulfate, and are environmentally friendly.

Can I use Lead-Acid battery chargers or charger/tenders?
Yes. HOWEVER, you may NOT use a charger/tender if it has an automatic desulfation mode, which cannot be turned off. We have confirmed with Deltran, makers of the Battery Tender brand, that their products do NOT have a desulfation mode, and are therefore OK for use with Shorai batteries.

Can Shorai LFX be mounted in any position?
Yes. There are no liquids in these batteries.

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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 LFX18 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 LFX18 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.

Customer Reviews

12 Reviews | 4.9 out of 5
5 stars (11)
4 stars (1)
3 stars (0)
2 stars (0)
1 star (0)
Would recommend this product.
What our Customers are saying
Awesome Motorcycle Battery
November 22, 2022
by on November 22, 2022

I just replaced my original Shorai battery on my BMW motorcycle with this new one. My original lasted exactly 10 years, which I think is outstanding. I do keep it on the Shorai charger when I'm not riding, and its storage mode probably contributed to the battery's long life. The battery also saves a lot of weight on the bike, which is appreciated.

SF Bay Area, CA, USA
Would recommend to a friend?
Switch to LIFEPO4 Battery
August 11, 2021
by on August 11, 2021

Replaced lead acid battery on 2016 R1200GS LC. I'm aware of the process to warm the battery in very cold climates, and don't see that as a major problem (living in Scottsdale AZ). What a difference in weight. One gotcha is that the battery management cable that is used with the Shorai Charger for Lithium, has a housing / connector that is incompatible with the mounting enclosure on the bike. By removing the connector housing I was able to get wiring to conform, but they should use a right-angle connector or lower profile connector. To many this would be a show stopper I suspect. The extra foam pads supplied were unnecessary, as the battery was the same size as the lead acid one I removed. CCA is significantly greater with maybe 1/8 of the weight. Starts right up, no problem and charges more quickly it appears. I purchased longer (M6 as I recall) bolts for attachment of connectors.

Scottsdale, AZ
Would recommend to a friend?
Dont use a Deltran charger, use the Shorai charger
May 10, 2021
by on May 10, 2021

I put a Deltran battery tender on my Shorai battery and the next day it had blown the battery up. It has been a good battery for 2 years I hadn't started the bike in awhile and figured I would hook up the tender. I will buy a new battery but this time I will get the correct charger.

Would recommend to a friend?
Shorai battery
October 8, 2019
by on October 8, 2019

Just purchased this battery but seems to work as described.

Would recommend to a friend?
Shorai battery
August 5, 2017
by on August 5, 2017

This is my second Shorai battery, the first one is still in one of my bikes, that's why I bought another one... they work great, they are light and have a long shelf and working life.

Would recommend to a friend?
Amazing Shorai
December 18, 2016
by on December 18, 2016

I have recently purchased one Shorai from Battery Mart. Easy to order, best price, and shipping was FAST. After seeing the performance of the battery and the fantastic service that was provided by Battery Mart I ordered two additional Shorai's for our ATVs. They weigh a fourth what traditional batteries weigh and the additional amps and performance are amazing. Thanks to Battery Mart I made the right decision versus the other options.

Would recommend to a friend?
February 5, 2016
by on February 5, 2016

The day my new battery arrived it was thrown over the fence and 20 feet into my front yard by the Fed Ex driver. I went to meet him just as he did it. If this battery had been acid filled, it would have been ruined. And the box that Shorai provides to ship there batteries is so well protected and designed, it could take a 50 foot drop on concrete I bet. I dropped it into my 2012 Kawasaki Concours that the stock battery finally gave up in, and it started right up.

I didnt charge it just put it in the bike. It sat a week because its too cold to ride and after a week of sub 40 degree weather it started right up again! Nuff said...

Would recommend to a friend?