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LFX21L6-BS12 Shorai 12v 21 AH PBEq LiFePO4 Power Sports Battery [- +]

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In order to ship Priority IATA imposed new Shipping Regulations regarding Lithium Batteries. Lithium Batteries being shipped Priority are only charged to 30% of capacity. When you receive this battery it may need to be charged. This is the battery charger we recommend for this battery: Shorai 6v/12v 2 Amp LFX Series Lithium Battery Charger Sho-BMS01

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Product InformationStore Part Number: LFX21L6-BS12


Replaces: HYTX14HL, YTX20HL, HYTX16BHL

The Lithium Iron Phosphate battery is the ultimate in weight versus power technology. This battery weighs in at only 3.03 pounds and offers an incredible 315 C.C.A. This is a drop in replacement for your Lead-acid battery, and will require no change to your stock charging system.

Shorai LFX batteries contain Shorai-proprietary eXtreme-Rate Lithium Iron prismatic cells (chemistry LiFePO4). They contain no poisonous lead, no acid, and do not create gasses during charge, as traditional Lead-Acid batteries do. Compared to lead-acid, Lithium Iron Phosphate batteries are also extremely light, have much lower self-discharge, do not sulfate, and are environmentally friendly.

This is the heavy duty LFX21L6-BS12 battery. It offers an incredible 315 C.C.A., and the Lead-Acid Equivalent of 21 amp hours. It weighs in at only 3.03 pounds and yet still has the power to spin over even the most stubborn engines. Not only does this battery offer incredible advantaged over the lead-acid battery in weight, but also in physical size. This battery will effectively take the place of a YTX20HL in power, but it is not larger than a HYTX14HL battery.

We recommend using this battery in your regular commuters, your frequent play vehicles, and anything that may require that extra punch to start.

*BatteryStuff understands the importance of getting a replacement battery right away and usually ships all batteries the same day as ordered if received before 1:30pm (Pacific), however USPS does not guarantee delivery times with priority mail.


  • No more dead batteries. Holds charge for one year without maintenance
  • Ultra light. One fifth the weight of lead-acid batteries on average
  • Twice to four times the service life of lead-acid batteries
  • Drop-in replacement for your OEM battery
  • Military spec Carbon Fiber Composite Case
  • Faster cranking for better starts
  • Super-fast recharge rate
  • No explosive gasses during charge, no lead, no acid
  • Environmentally friendly
  • Japanese engineering and components


We recommend using these batteries in temperatures above 0 degrees Celsius. This battery may require spacers to make it work in your application. Included with this battery are foam spacers that will aid in fitting this battery. ** PbEq equals Lead-Acid Equivalent. This means that a 21 AH PbEq Lithium Iron Phosphate battery will perform the same as a 21 amp hour Lead-acid battery.

Recommended Charger

Shorai Charger Sho-BMS01
The Sho-BMS01 is a Charge/Store dedicated battery managment system that is designed specifically for Shorai batteries.

Works In

Vehicles that LFX21L6-BS12 works in

BMW K1600GT,GTL(2011-2013)
Bombardier Sea-Doo 1500cc GTI(1994-2006)
Bombardier Sea-Doo 1500cc All Models (excluding 4 stroke)(1994-2007)
Bombardier Sea-Doo 780cc 3D, XP(1996-2007)
Buell 1125cc 1125R(2008-2010)
Harley Davidson 1200cc XL, XLH (Sportster)(2004-2013)
Harley Davidson 883cc XL, XLH (Sportster)(2004-2013)

Tech Specs

  • Dimensions (LxWxH): 5.83 x 3.23 x 5.51 in
  • Part Number: LFX21L6-BS12
  • Weight: 3.03 lb
  • Shipping Weight: 3.5 lb
  • DC Output Voltage: 12V
  • Model: LFX21L6-BS12
  • Manufacturer: Shorai
  • Battery Polarity: -+
  • Warranty: 3 Year Manufacturer
  • Recommended Use: Heavy Duty Powersports
  • Amp/Hr: 21 PbEq
  • C.C.A.: 315
  • Manufacturer Part #: LFX21L6-BS12
  • Made In: China

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Reviews and Ratings

5.00 Average
5 Stars 2
4 Stars 0
3 Stars 0
2 Stars 0
1 Stars 0
Rated 5.00/5 Stars from 2 customer reviews.

Do you own the LFX21L6-BS12? Please, tell us what you think about it. It helps us provide you with better products. Please note that it may take up to 72 hours for your review to appear.

Lithium 21 AH PBEq
Pros: Just purchased the battery and it is great so far. This is a Lithium that is much smaller than the standard batteries. It was much easier to install with all the "filling material" than I had expected. Enough different size and thickness material comes with the battery that you only need to select the correct material and cut to fit. The whole process took less than 15 minutes to have the battery and filling material properly sized. Battery is too new to say how well it holds up. Since it's about twice the price of a standard battery, I hope to get at least five years before replacing.
Cons: None so far.
Is this review helpful?
Written by papalynn on Mar 09, 2012. Ownership: Just Bought. Knowledge Level: AC/DC is more than a band — (89 of 172 customers found this review helpful
Something REALLY New and Improved
Pros: This battery is a dream. I can't believe the low weight. Not only is the weight of the bike reduced, but installation in the tight spot on my bike was easier because the battery is so much easier to handle. The instruction sheet was complete and simple. The future is NOW!
Cons: None!
The only thing I had to give extra effort to was that the battery box needed shims as the new unit is slightly shorter than the original unit. The shims provided are easy to cut to fit where necessary, and took just a few minutes to install once I measured the old and new.
I am very glad that I spent a few extra $ to move into the 21st century.
Is this review helpful?
Written by Bob on Aug 21, 2015. Ownership: Just Bought. Knowledge Level: AC/DC is more than a band — (6 of 9 customers found this review helpful

See More Reviews

Manuals & Tutorials

Installation Guide

User Manual

Lithium Battery Overview

Shorai Abuse Test

Lithium Iron FAQ

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