Battery Equivalents and Replacements

Shorai LFX19A4-BS12 Lithium Starting/Cranking Battery

Shorai LFX19A4-BS12 is a lithium battery designed for us as starting/cranking batteries in Powersports vehicles like motorbikes, snowmobiles, ATVs, and similar.

Shorai LFX19A4-BS12 features a compact and rather lightweight design, simple use and maintenance, good starting characteristics, low self-discharge rate, affordable price, etc.

However, one also has to know that Shorai LFX19A4-BS12 doesn't feature an internal balancer, and the use of a SHO-BMS01 Lithium Battery Charger/Maintainer/Balancer from time to time is highly recommended.

Updated: January 13, 2023.

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 Shorai LFX19A4-BS12 Features and Specifications

Shorai LFX19A4-BS12's physical dimensions are (L x W x H) 5.83x 3.39 x 3.46 inches (~148 x 86 x 88 mm) - Shorai's case size #4, and it weighs just 2.47 pounds (1.12 kg).

On average, Shorai LFX19A4-BS12 is an ultra-light battery featuring 20-25% weight of the lead-acid batteries it is intended to replace.

With its 285 Amps CCA rating, the Shorai LFX19A4-BS12 lithium cranking battery is designed to replace lead-acid AGM starting batteries of ~19 Ah or less if it can fit the battery compartment.

Most often, Shorai LFX19A4-BS12 is smaller than the battery it is intended to replace - fortunately, self-adhesive foam spacers are included.

shorai lfx19a4 bs12 terminals w500px

When mounting the battery, be sure about its orientation - positive ("+") terminal is to the left, and negative ("-") terminal is to the right.

Since lithium iron phosphate batteries are safer than other lithium chemistries, Shorai LFX19A4-BS12 batteries are delivered fully charged.

Also, it obviously features zero sulfation and ensures faster cranking.

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How to Charge and Maintain Shorai LFX19A4-BS12 Battery?

Shorai LFX19A4-BS12 is a drop-in replacement for similar AGM batteries in Powersports vehicles.

Its voltage should be kept between 13.1 volts and 14.8 volts - if the vehicle has an alternator to charge the AGM battery, it will also charge the Shorai LFX19A4-BS12 battery.

Note: charging system output voltage should never pass 15.2 volts, or it may damage the battery. The maximum charging current is 19 Amps, allowing the electric system or user to recharge the Shorai LFX19A4-BS12 battery quickly.

However, when charging this battery directly, keep in mind the following:

  • Older lead chargers without automatic charging shut-off should never be used for safety reasons.
  • Modern, automatic lead battery chargers with automatic charging shut-off at 14.8 volts can be used ONLY if the desulfation mode can be turned off. But, after the charging is done, they must be disconnected at once. Better safe than sorry.

shorai sho bms01

  • The use of the Shorai SHO-BMS01 Lithium Battery Charger/Maintainer/Balancer is highly recommended. First of all, Shorai SHO-BMS01 is NOT connected to the terminals but to the special port on the battery, allowing it to check, balance, and charge every battery cell individually, greatly increasing its operating life, safety, and reliability.

shorai sho bmscbl12

And if Shorai SHO-BMS01 cables are too short, one can get an "extension" cable as well.

Note: Shorai LFX19A4-BS12 is an excellent and affordable starting lithium battery, but it lacks a built-in battery management system (BMS) that would monitor and balance battery cells individually. That is why these batteries tend to be slightly cheaper than similar starting batteries with full BMS installed.

If you need just one lithium starting battery, getting one lithium starting battery with a BMS system can be cheaper than getting both the Shorai LFX19A4-BS12 battery and the Shorai SHO-BMS01 battery charger.

If you need more than one lithium starting battery, getting one Shorai SHO-BMS01 and several Shorai LFX19A4-BS12 can save You some money, too.

On the other hand, many users purchased the Shorai LFX19A4-BS12 battery without Shorai SHO-BMS01 Charger/Balancer/Maintainer and are more than pleased with the purchase.

Often, it all depends on the used vehicle(s) and personal habits.

Shorai LFX19A4-BS12 Lithium Battery Frequently Asked Questions (FAQ)

Here are some of the most common Frequently Asked Questions (FAQ) about the Shorai LFX19A4-BS12 battery:

How long do Shorai batteries last?

Shorai lithium batteries last for 5-6 years when maintained properly and when the vehicle has a modern charging system that never charges the battery above 14.7-14.8 volts.

To prolong the Shorai lithium battery lifetime, it is recommended to recharge them at least once or twice per year with a Shorai SHO-BMS01 battery charger.

Can you charge a Shorai battery with a battery tender?

Yes, Battery Tender can recharge the Shorai battery, but it cannot balance the cells and do other tasks dedicated Shorai SHO-BMS01 battery charger can do.

How often charge Shorai battery?

Shorai lithium batteries used in vehicles with very low self-discharge rate should be recharged once or twice per year.

If the motorcycle is not used for more than 2 hours per month, it should be charged several times per year, depending on the parasitic currents.

shorai lfx19a4 bs12 mLong Story Short: If you are looking for a strong, lightweight, and reliable lithium starting battery for a vehicle that requires 285 CCA or less, consider Shorai LFX19A4-BS12.

It is very light, can provide plenty of power, has a very low self-discharge rate, and is easy to maintain.

Also, it has very good starting features when properly maintained and charged, even in very cold conditions - just be sure to warm up the battery by turning the lights on for a short time.

Before the very first use/installation, be sure to read the manual/instructions that come with the battery - better safe than sorry :)

For more reviews and recommendations, check Shorai LFX19A4-BS12 and Shorai SHO-BMS01 Amazon links (links open in the new window).