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SigmasTek  |  SKU: BW-18413

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

Sale price $59.98 USD Regular price $82.13
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


📦🚀 FAST SHIPPING: Usually ships same day if ordered before 2 PM EST

⚠️ Quick Reminder

🔹 Please ensure the original battery model number is listed in our product description and that your device model number matches for compatibility.
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Battery Care Guide

Battery Usage and Maintenance Guidelines 🔋

Please read the following instructions carefully before using your new battery. Proper adherence will help ensure optimal performance and extended service life.

1. Cordless Phones, PDAs, and Power Tools (NiMH, NiCd, Lithium-Ion) 📱

Initial Charge

  • Fully charge the battery overnight prior to first use.

Conditioning (First 2–6 Charge Cycles)

  • Operate the device until the battery reaches approximately 20% capacity.
  • Avoid premature recharging.
  • Do not allow the battery to fully discharge during the initial cycles.

Post-Conditioning

  • Recharge the battery only when necessary.
  • These batteries are capable of approximately 500 charge cycles:
  • Once daily → ~500 days
    Twice daily → ~250 days
    Note: Even a partial recharge is considered a full cycle.

2. Sealed Lead Acid (SLA) Batteries 💡

  • No conditioning required.
  • Maintain the battery in a fully charged state; avoid complete discharge.
  • Capable of 300–400 charge cycles.
  • Expected service life: 2–3 years, depending on usage conditions.

3. Laptop Batteries (Lithium-Ion) 💻

Initial Charge

  • Fully charge the battery overnight prior to first use.

Conditioning (First 2–6 Charge Cycles)

  • Charge fully, then discharge to approximately 20% capacity.
  • Avoid complete discharge, as some devices may not detect a fully drained battery.

Post-Conditioning

  • Minimize frequent plugging and unplugging.
  • Allow the battery to discharge moderately at least once per month to maintain optimal performance.
  • Occasional cycling is recommended to sustain battery health.

Professional Recommendation

Adhering to these guidelines will enhance battery longevity and ensure reliable performance.

For further assistance regarding your battery or order, our customer support team is available to provide guidance.

Delivery and Shipping

Everything You Need to Know About Shipping with BatteryWeb (USA)

We know reliable delivery matters when you need power fast. Here’s how BatteryWeb makes shipping easy across the USA:

🚚 Shipping & Delivery

Most orders ship next business day (some products like sealed lead acid may take a little longer).

Same-day shipping available if you order before 11:59 AM (delivery depends on the carrier).

We ship nationwide using FedEx, UPS, USPS, DHL, and regional ground carriers.

Shipping costs are calculated automatically at checkout based on weight, distance, and carrier.

Transit times shown are estimates only (business days, no weekends/holidays).

🌍 Shipping Restrictions

Lithium batteries cannot be shipped by USPS or air. They must go via FedEx Ground, UPS Ground, or DHL Ground.

PO Box deliveries are only available via USPS.

At this time, we do not ship lithium batteries to Puerto Rico. NiMH, NiCd, and Alkaline can be shipped.

📦 Important Notes

Double-check your shipping address! If an incorrect address is used and the order is returned, re-shipping costs are the buyer’s responsibility.

If a product is temporarily out of stock, we’ll notify you right away with the expected restock date—or issue a refund if you prefer.

💲 Currency & Pricing

All prices are shown in USD.

Orders shipped outside the USA may be subject to local taxes, customs fees, or import duties. These are the buyer’s responsibility.

⚡ At BatteryWeb, we’re committed to getting your batteries delivered quickly, safely, and affordably—so you’ll always have the power you need, when you need it.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

🔹 Our products are generic replacement parts and are not affiliated with, endorsed by, or manufactured by the original equipment manufacturers (OEMs).


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.


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