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SigmasTek  |  SKU: BW-18413

Kawasaki (Jet Ski) JS440 440CC 1977-1986 High Performance Replacement Battery 11.62 lb

19% off
Sale price $75.99 USD Regular price $93.99
Shipping calculated at checkout.
Maintenance-free AGM design eliminates acid refilling
Spillproof and leakproof for safe, hassle-free use
U.L. recognized and CE certified for quality assurance
Extreme resistance to freeze, heat, and vibration conditions
Superior starting power with deep cycle capacity for reliable performance
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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Volts & Amps

12 Volts | 18 Ah

Terminal Type

Nut & Bolt

Kawasaki (Jet Ski) 440CC JS440, 1977-1986 Replacement Battery (Kawasaki JS440)

Ensure dependable starts and reliable on-water performance with this replacement battery for the Kawasaki (Jet Ski) 440CC JS440, 1977-1986. This AGM maintenance-free unit is designed to withstand marine conditions with spillproof construction and vibration resistance, delivering the consistent power required for classic Jet Skis. As a direct replacement battery for the JS440, it combines rugged construction and maintenance-free convenience to keep your watercraft ready.

Key Specifications

  • Model Compatibility: Kawasaki (Jet Ski) 440CC JS440, 1977-1986
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Battery Type: AGM (Absorbed Glass Mat), Maintenance-Free
  • Design: Spillproof and Leakproof
  • Certifications: U.L. Recognized and CE Certified
  • Vent System: Valve Regulated Vent System
  • Resistance: Extreme Freeze, Heat and Vibration Resistance
  • Performance: Superior Starting Power and Deep Cycle Capacity
  • Condition: Brand New, Factory Fresh
  • Warranty: 6 Month Warranty
  • Terminal Type (as listed): Nut & Bolt
  • Brand Reference in Listing: SigmasTek

Benefits

Built to handle the challenges of marine and recreational use, this Kawasaki JS440 replacement battery offers strong cold and wet-start performance and excellent resistance to vibration and temperature extremes. The AGM technology gives you a maintenance-free, spillproof design that is safer to mount in confined spaces and more tolerant of movement and tilting—important for Jet Ski applications. As a long-lasting battery solution, it reduces downtime and the need for frequent replacements.

This high-performance battery is not only ideal for the JS440 but is also useful as a compact backup power source for small UPS systems, emergency lighting, and portable tools where a rugged 12V supply is needed. The combination of superior starting power and deep cycle capacity ensures reliable cranking and effective support for accessories and onboard electronics.

Shipped brand new and factory-tested with a 6 month warranty, this replacement battery arrives ready to install. The nut-and-bolt terminal format permits secure connections, allowing quick replacement and immediate return to water.

Don’t let a weak battery slow you down—purchase this Kawasaki (Jet Ski) 440CC JS440 replacement battery today for a reliable, long-lasting battery that keeps your Jet Ski performing at its best. Order now and get back on the water with confidence.

Technical Specifications

Voltage12 Volts
Amp Hours18 Ah
Terminal TypeNut & Bolt
Cold Cranking Amps (CCA)270
Length (in.)6.89
Width (in.)3.43
Height (in.)6.14
Weight (lb.)11.61

Product Highlights

  • Brand Replacement : Kawasaki
  • Manufacturer: SigmasTek
  • Product Type: Personal Watercraft
  • Warranty: 6 Months
  • Bulk Orders: sales@batteryweb.com

Connections & Interface

  • Polarity: "'-/+"

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