AGM PERFORMANCE BATTERY ULB20L-BS

The Battery Built for Watercraft That Never Quits

Power a Kawasaki Ultra, Sea-Doo RXP-X, Yamaha WaveRunner, or any personal watercraft that demands reliable starts — session after session, in conditions that would kill a standard battery.

The UNLIMITED PWC AGM Battery delivers where it counts: at the moment of ignition.

Specifications

Key Features

Innovative Power Balance Design

Powersports batteries face three relentless challenges: intense vibration, high electrical load at ignition, and the additional draw from accessories and electronics. Most batteries are designed around Cold Cranking Amps (CCA) alone — and that's where they fall short.

UNLIMITED's Power Balance design rethinks this equation. By prioritizing amp-hour (Ah) capacity alongside cranking power, the battery recovers charge rapidly between starts. That means repeated ignition cycles — like the multiple restarts common in riding, launching, and docking — never catch it off guard.

The result: a battery with reserve capacity to spare, even under demanding real-world loads.

AGM (Absorbed Glass Mat) Construction

This battery uses AGM technology — the same design trusted in motorsports, marine, and military applications worldwide.

What that means for you:

• No liquid electrolyte to spill. The electrolyte is fully absorbed into glass mat separators, making this a true dry battery. Ride hard, hit chop, flip the ski — no leaks.
• Maximum plate contact, always. The glass mat holds electrolyte in direct, constant contact with the battery plates. More contact means better efficiency and more consistent output.
• Vibration resistant by design. Plates wrapped in glass mat absorb vibration that would degrade a conventional flooded battery.
• Far lower self-discharge rate than wet-cell batteries. Sits in the garage all winter without dying.
• Deep discharge capable. If the battery runs flat, a proper charge restores full performance — no permanent capacity loss.
• Factory-activated, ready to install. About 80% of early battery failures trace back to improper electrolyte filling at the customer level. UNLIMITED batteries are fully charged and activated at the factory. Open the box. Install it. Ride.

Compatibility

Designed as a direct replacement for YTX20L-BS batteries. Compatible with a wide range of PWC models including select Kawasaki, Sea-Doo, and Yamaha personal watercraft. Always confirm fitment against your model's factory specifications before ordering.

Important Shipping Notice

International customers (outside Japan): This battery contains dilute sulfuric acid and is classified as a hazardous material under international transport regulations. As a result, international orders must ship via ocean freight only — air shipping is not available for this product. Please allow additional delivery time when ordering from outside Japan. We appreciate your understanding and will provide tracking information as soon as your shipment is dispatched.

UNLIMITED PWC — Born on the Water. Built for the World.