Best Battery for Yamaha R6 – Yuasa vs Shorai

best battery for yahama r6

If you are looking to replace your battery on the Yamaha R6, here is what I recommended.

The best battery for Yamaha R6 is the Shorai lithium battery. It has stronger crank power, shorter charging time and are able to hold its charge longer. However, it needs some warm up time, especially in cold climate.


Yuasa YTZ105 battery

Yuasa YTZ10S batteryFit: This battery work for models up to 2011. Will not fit any models newer than 2011.

The Yuaza stock battery works perfectly as a replacement battery for Yahama r6. It installs without any problem. Best of all, it costs only 70% of what a Yamaha battery will cost.

This new battery will remove all your startup problems that arise as result of your current battery getting old. Just remember if you are starting with the new battery for the first time, keep the bike running for a minute to charge the battery.

However, lead acid battery quality in general has decline over the years and this is no exception. On average, this will last about 3 to 3.5 years whereas the original battery will last about 5.

Maintenance tips: Put the battery on a float charge if possible. This allows the battery to maintain a full charge without overcharging.

Editor note: If you purchase this battery from Amazon and it will not charge, check the manufacturer’s date. It is very likely that your particular battery might be in the warehouse for too long a time.


Shorai LFX14A4 lithium battery

Shorai LFX14A4Fit: This model work with any R6 models up to 2014. It might also work with 2015-2019 models but I did not have any info so it is better to as the dealer or online store.

The Shorai lithium battery is a powerful replacement. If you never used lithium battery, say hello to instant start ever after a long winter break. Installation is also much easier.

One advantage of Shorai battery is that the cells are designed and made by the company itself. It is not using the same a123 cells that many other brands are using. This is why Shorai batteries are considered a premium product, compared to the likes of Yuasa.

However, whether you are willing to pay a premium price depends on your preference. If you just want a stock battery, go for Yuasa.

Maintenance tips #1: Lithium battery needs to ‘warm up’ in cold temperature. If the temperature drops to 35 F or below, turn the ignition on for 45 seconds before riding out. It allow the battery to heat up and perform better.

Maintenance tips #2: Also, it is advisable to buy a balance charger than instead of any battery charger. This is because lithium batteries comprise multiple cells. They need to maintain relative similar voltage. If one discharges too much relative to others, the whole battery suffers. A balanced charger can do this while charging the batteries.


Shorai vs Yuasa battery

Shorai vs Yuasa battery


So the choice comes down to Yuasa and Shorai.

The biggest difference is that Shorai is a lithium battery while Yuasa is a lead acid battery. Hence Shorai batteries charge faster, hold their charges longer, have better crank power and are lighter. However, Yuasa battery starts faster in cold temperature while Shorai battery needs to warm up.


Here are the details on the benefits that are summarized above:

  • Faster charge – A lithium battery usually needs 1-2 hours to be fully charged. In comparison, a lead acid battery needs about 12 hours of charging time.
  • Discharge rate – A lithium battery discharges about 3% per month while a lead acid battery discharges about 4% per week or 15% month.
  • Longer battery life – A Yuasa battery can last about 3.5 years while a Shorai battery last about 5 years.
  • No dangerous gas discharge – A lead acid battery discharges hydrogen which is explosive but a lithium battery has not such gas discharge
  • Weight – A Yuasa battery usually weighs around 5 pounds while a Shorai lithium battery weighs around 1.5 pounds. This means a lithium battery can save you about 4 pounds in weight when compared to a lead acid battery. While this might be insignificant by itself, it can contribute to folks who consciously want to make their bikes lighter for racing reason.
  • Crank power – On a per pound basis, lithium battery cranks power than a lead acid battery.


While Shorai lithium battery have better performance, there are  3 concerns we need to address

  • Waking up” – Lithium batteries need to be ‘woken up’ before their cranking power can be fully unleashed. Usually, you need to insert the keys and wait about 6 second before turning the battery on.  If you do it earlier, you will hear the sound of a somewhat weak battery.
  • “Warming up” in cold temperature – As temperature drops to almost zero C or 34 F, the battery needs to warm up. If you are intending to race during cold temperature, a lithium battery like Shorai is not the best choice.
  • Cannot bump start dead lithium battery – If your lead acid battery goes dead, you can always bump start it. Not so for lithium batteries.


For usual riding, the best battery for the Yamaha R6 is the Shorai lithium battery. While it costs more (including the cost of the charger), the many benefits, including a longer shelf life, makes it more value for money. The fact that Shorai has a longer warranty than Yuasa already made it worth the higher price in my mind.

However, if you are into racing, then the whole category of lithium battery might not be the best choice. This is due to the many variables that comes with a new technology, which makes it less dependent during races.

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