Expected to ship in 1-3 weeks after purchase. Lead times vary based on order volume and we will try our best to beat our fulfillment estimate. Thanks for understanding!

Looking to push the bar past 72V? Well this battery upgrade may be the one for you. The Gladiator 81 Max is our highest voltage Sur-Ron battery yet! Requires an aftermarket controller capable of handling 92.4V as well as a 92.4V charger. 

Comes in a steel enclosure, which is built in-house starting with a sheet of raw steel that is bent, welded, powder coated, and laser engraved by our highly trained fabrication team. Features an injection molded lid with discharge wires coming out the front for easier wire management. 

How does it stand in our lineup? 

The 81 Max is a high voltage battery upgrade designed for speed demons and high power enthusiast. If you are trying to turn your bike into a rocket ship, this is the battery. Rated for 28KW of continuous power and 39KW peak you will have enough power to leave orbit! Higher voltage means higher efficiency, so even if you aren't pushing the limits this battery will provide you with longer, smoother, and more enjoyable rides. The Gladiator 81 Max is the same height as our Gladiator 60 Max battery, which means its shorter than the Gladiator 72 Max battery - so if you want the higher voltage without needing to lift the lid as much, this is a great option. If you are looking for stock fitting batteries, check out our Pulsar series! 

This battery will require you to have a 92.4V compatible controller, as well as a 92.4V charger. The stock Sur-Ron controller and charger are not compatible with the Gladiator 81 Max. If you’re looking for a battery that is compatible with your stock Sur-Ron controller/charger, we recommend checking out the 60 Max or the 66 Max. Compatible with 2024 Sur-Ron but requires QS8/QS10 version of the battery. We strongly recommend the QS10 for the highest power delivery applications. 

Order cancelation requests after 72 hours are subject to a 25% re-stocking fee. All battery sales outside of the lower 48 are final and cannot be refunded or returned. Battery servicing for Hawaii customers is outsourced to a local repair center. If you are having issues with a product please reach out to our support team.

Specs

Super powerful 81V battery  that can provide 28kw of continuous power (39kw peak) and a much higher top speed compared to your stock battery. Includes new custom steel enclosure, upgraded discharge wiring and connector, reinforced carrying handle, injection molded battery cap, hardware for stock-lid fitment, and CNC milled Acetal battery tray. Comes standard with QS8 connector and upgraded wiring (7 AWG). Select Supra option for stock harness compatibility. Also available with QS10 and 6 AWG. 

The 81 Max is built in-house using grade A 21700 cells with a Smart BMS and a custom PCB. It can deliver 350 Amps of continuous discharge and 450 Amps peak. Provides high performance throughout discharge and includes overcharge protection. Pure nickel is used in construction, allowing the battery to run at staggeringly high efficiency and eliminating the possibility of overheating. Cell groups are isolated for superior durability, impact resistance, and each individual cell is fused for safety.  

CLICK HERE TO SEE FULL BATTERY SPECS SHEET.

Add On

QS8 Bike Harness:

This is a harness cable upgrade for your Sur-Ron, replacing the OEM bike harness to provide higher current capability. Comes with a Male QS8 connector with 7 AWG. This harness cable is not used with the Sur-Ron breaker, which can be removed from the bike, giving you more space for wire routing. The harness comes with an inline fuse pre-installed. Meant to be paired with the QS8 connector version of this battery. 

How to correctly use the connectors: Plug in the first half of the connector for 3-5 seconds to allow for the filter capacitors to pre charge before making the full connection.

92.4V 10 Amp Charger:

Charge at double the speed so you can get back to riding faster! 110V compatible only.