Shorai LFX19A4-BS12 Lithium Iron Motorcycle Battery Review


In Brief: Shorai LFX19A4-BS12 Battery Review

If you are looking for an excellent motorcycle battery that will not die on you, then this is one of the best options on the market.

Shorai was founded in 2010, and it quickly became one of the best battery manufacturers.

Based on California, the company started producing these LFX batteries that are less than half the weight of lead-acid batteries. Plus, they last much longer.

The LFX19A4-BS12 is just one of a wide range of quality lithium batteries that are available in many different sizes.

Even though they are slightly more expensive, they still sell at a very competitive price for Shorai Power!

Key Specifications Of The LFX19A4-BS12 Battery

Shorai LFX19A4-BS12 LFX Lithium Iron Light Weight High Performance Motorcycle Battery for Street Bike Motors Larger than 600cc - 19 Ah 12 Volt 2.5 Lbs 285 CCA - RIGHT NEGATIVE TERMINAL - 5 YR WARRANTY

This Shorai LFX battery has a very slow discharge rate to allow it to hold its power for longer.

This means that there will be a much longer time between charges, and the battery will not lose its power easily.

Being compatible with the normal lead-acid battery charger allows for a much easier charge for this battery.

It is smaller than the standard lead-acid batteries, but it will still fit snugly in the battery compartment with the padding.

The padding that is included will help to make up for the reduced size, as well as help reduce vibrating. It is also very easy to use the padding, and it can be done with very little effort and time.

It is available in many different case sizes to be suitable for use on many different types of bikes.

You have a much higher power output with this battery, which provides you with a stronger cranking power for the engine.

Output19 Amps
Cold Cranking Amps285 Amps
Voltage 12 V
Amp-hours19 Ah
Max charge rate19 Amp
Power output60 W/h
Total weight2 pounds

See the following video on comparison and what to expect from the Shorai LFX battery:


How To Use The LFX19A4-BS12 Battery

  • When installing the Shorai LFX battery, please read the installation guide.
  • When removing the old battery, remove the negative cable first, then the positive cable.
  • Compare the old and new battery side by side to determine the size. The new LFX should not be larger than the old battery.
  • If the new LFX is shorter or smaller, use the spacer foam provided to make up the difference.

See this video from Shorai on how to properly install the battery:


Warranty And Repairs

These Shorai batteries come with 3 levels of coverage. To get the warranty, go to Shoraidirect’s website and follow the instructions.

  • 1 month: You get a 35-day warranty and an extensive discount on the retail price of the product.
  • 1 year: You receive 365 days of coverage and a large discount on the retail price.
  • 2 years: With this, you get 730 days of coverage and a small discount on the retail price of the product.

Customer Review Analysis

If you need a battery that will shed weight from your bike for better performance, this battery is light enough to do so.

This battery fits perfectly in the space that is provided for the battery, and it does not shift around.

It is powerful and will crank the engine much faster than the stock lead-acid battery that was on the bike before.

Every bike owner should have one of these batteries installed on their bikes for better performance and longevity. Plus, it is much lighter.

It will take some effort to get the battery to fit in the place where the original battery was, but it can be done quickly.

With the spacer foam included, it will only take you a few minutes to get it sized up in the compartment.

This is the best battery for new and older models of bikes to replace the stock battery with one that offers longer battery life.

It may be compatible with the normal lead-acid battery charger, but it is still much easier to just buy the charger from Shorai.

Even if it is smaller and lighter than the lead-acid battery, it still puts out far more power.


Pros And Cons Of The LFX19A4-BS12 Battery


  • This battery is quite compact and much lighter than the lead-acid battery
  • You get a very slow discharge rate from the battery, so it will last much longer
  • It is very easy to install this battery
  • The two-sided terminals provide better flexibility and easier connections
  • You get more power to crank the engine, even when not used for a while


  • There is no cell-balancing circuitry built into this battery
  • Some modification is needed on the terminals when you install it on Japanese bikes
  • You will need a special charger to charge this battery

Who Should Buy

This is the perfect battery for all bike owners out there who need to replace the stock battery with a new one.

It is also great for those people out there who need a lighter-weight battery in order to get better performance from their bike.

It is great for the colder regions, and it is excellent if you need to have more power to crank the engine. Even though it is smaller, it will fit many different types of bikes.

Our Recommendation

For a more powerful battery output in a smaller and lightweight package, this is an excellent choice.

If you are a professional biker, this is the right battery to use if you want to make the bike lighter.

It is not just for the professional, but it is also great for the recreational rider. It is the perfect battery to use as a replacement.

Also, you can use this battery for your bike if you want to save charging time.

About Ryan Henderson

Ryan has more than ten years of experience writing about power tools. He is an expert in the field, and is able to provide unique insights into the reviews, use, and maintenance of various products. He enjoys cooking when he's not working on his articles, as well as spending time with his dog.