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Shorai LFX Lithium Battery LFX18A1-BS12... [Previously Installed]
  • Shorai LFX Lithium Battery LFX18A1-BS12... [Previously Installed]

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Video Review

Shorai LFX Lithium Battery LFX18A1-BS12... [Previously Installed] Videos

Note: This item has been previously opened and/or installed. Signs of installation may be present including opened packaging and minor scratches, however item is functional and contents are complete.

Shorai LFX Lithium Battery

The Shorai LFX Lithium motorcycle batteries are some of the lightest and most powerful replacement batteries available!

See Shorai Specifications and Dimensions data sheet (pdf) for fitment guide and specifications.

Most powersports enthusiasts have gotten used to hooking up a tender to their lead-acid batteries, all the time. Shorai LFX have much slower self-discharge than the best lead acid do (1/6 to 1/7, on average), they do not sulfate as capacity drops, and they are the ultimate "deep cycle" battery, which means that they can still crank your vehicle even if the remaining capacity is quite low. Therefore most riders will not need to use a tender at all. 

A fully charged LFX can sit for a year or more and still retain adequate starting capacity, without damaging the battery. As such, any vehicle which has no current flowing when the key is OFF should never need a tender. At most it should be charged every 6 to 12 months, depending on the average storage temperature (cool storage is much better for any battery).

Newer vehicles may have a significant draw even when the key is OFF, to maintain clocks and computers, etc. In this case Shorai expects that a few hours of riding per month will be all that is needed to avoid tending. If you know that you will go a number of weeks or months without riding, you can either attach a tender, or disconnect the negative cable from the battery. In any case, during storage you may use the voltage chart above and an accurate voltmeter, and consider recharging when the battery is around the 50% capacity remaining mark, or above.


  • Ultra light - one fifth the weight of lead-acid batteries on average
  • Zero sulfation for longer service life
  • Holds unloaded charge for one year without maintenance
  • Military spec Carbon Composite Case
  • Faster cranking for better starts
  • Super-fast recharge rate
  • No explosive gasses during charge, no lead, no acid
  • Environmentally friendly
  • Two-Year Warranty!

Shorai recommends NOT using a charger/tender if it has an automatic "desulfation mode," which cannot be turned off. Shorai has 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 LFX. However the best possible charger/tender for Shorai LFX is the Shorai SHO-BMS01 Battery Management System.

  • Case Size 1: 148mm length
  • Case Size 2: 113mm length
  • Case Size 3: 166mm length
  • Case Size 4: 148mm length
  • Case Size 5: 134mm length
  • Case Size 6: 148mm length 

See Shorai Specifications and Dimensions data sheet (pdf) for fitment guide and specifications.

Please Note: It is extremely important that you use only the appropriate battery for your bike! A battery with incorrect amperage may damage the battery or worse yet, your ride. 

Shorai Batteries may not be a drop in replacement, some modification to battery box, terminals etc may be necessary.

If you have any questions about which battery may work for you, please call us at 877-792-9455.

Fitment Notes & Exceptions

This is a universal fit part; it may or may not fit without modification.

Product Style RevZilla Item # Manufacturer Product # Availability
LFX18A1-BS12 967016 Out of Stock


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Shorai Lithium Battery LFX18A1-BS12 4.6 5 149 149
Bike Fired Up First Try! Fast delivery, and showed up fully charged! Also came with padding to help install, and was extremely light compared to my old battery. Installation was a little tough, but only because Ducati Monster's don't have the best battery positioning. Once installed though, my bike fired up first try! Solved my dead battery issue real quick! April 5, 2016
Light and powerful Significantly lighter. Very easy to install, comes with padding to fill out space from the old battery. Solved my cranking issue. March 29, 2016
Light weight battery that has a lot of power I just installed this battery in my R1200 GSA and it works great. It fit well in the space provided in my bike. I used the padding that was sent with the battery and it looks great. I also bought the charger May 10, 2016
small , lightweight Excellent battery, easy to maintain, I brought one for my zx6R i also have one for my R1. May 10, 2016
Cured the slow crank My 2008 Triumph Sprint ST always had a slow crank. When it got hot, sometimes the last battery wouldn't turn it over. Now it's much faster and I'm impressed. No problem with starting. I read some opinions that Lithium batteries aren't great in cold weather, so I will try to update this after winter. May 10, 2016
Be careful! I put Shorais into 5 bikes, one has failed twice, the LFX21A6 BS12 in a HD Street Rod. the first failed after 'being excessively discharged " -maximum 3 months with out use or charging-the company was nice and replaced it with a warning to not enable full discharge. The second failed , about 2 months after last the use without problems, and constantly connected to Battery Tender brand charger, it was trash. I went back to a sealed acid battery. so much lass expensive and likely to last several yrs, as the previous did. I will not gamble again, why bother unless the weight saving is the goal?Having several bikes, each one gets less use-and most bikes now have parasitic loads-you must use the chargers, the Shorai charger has a 5 pin connection to each cell, but many current cycles do not make access to the battery convenient, A rival brand has circuitry to prevent total discharge-that maybe a safer bet . The Shorais in my KTM bikes have done better, but lower cranking capacity has me thinking its risky to use far off road. March 1, 2016
So far so good I ordered this to replace an aging battery in my BMW K series. It is indeed much lighter and the included foam makes for a great fit. I bought a charger as well so the price is fairly steep but if it performs as advertised I will think it worth it. The connections take a bit of thinking as they are not a direct fit but after some head scratching I was able to get a satisfactory set up. As always Revzilla was very fast shipping it to me and their price was competitive. Thanks Revzilla. April 13, 2016
want power? This battery might startle you when it arrives. It weighs much less than a lead/ acid battery. But it cranks like a mother. I got a Shorai for my porky FJR1300, and it lost a few lbs right off. Get one, you'll like it. February 16, 2016
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