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SigmasTek  |  SKU: BW-18425

Kawasaki (Jet Ski) JS400 400CC 1976 Compatible Replacement Battery

Sale price $59.98 USD Regular price $82.13
Shipping calculated at checkout.

➤ Maintenance-free AGM design eliminates acid refills

➤ Spillproof and leakproof for safe, worry-free use

➤ U.L. recognized and CE certified for quality assurance

➤ Superior starting power with deep cycle capacity

➤ Built to resist extreme freeze, heat, and vibration conditions


📦🚀 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) 400CC JS400 12V 18Ah Replacement Battery — Compatible with JS400 (1976)

Get reliable starting power for your Kawasaki (Jet Ski) 400CC JS400 (1976) with this AGM maintenance-free 12V 18Ah replacement battery. Engineered for the demands of personal watercraft, this high-performance battery combines spillproof safety and superior starting capacity so you can spend more time on the water and less time troubleshooting. Enjoy the peace of mind that comes from a durable, factory-fresh power source designed for marine conditions.

Key Specifications

  • Compatibility: Kawasaki (Jet Ski) 400CC JS400, 1976
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Battery Type: AGM Maintenance Free (Absorbed Glass Mat)
  • Design Features: Maintenance-Free, Spillproof and Leakproof
  • Certifications: U.L. Recognized and CE Certified
  • Valve System: Valve Regulated Vent System
  • Durability Traits: Extreme Freeze, Heat and Vibration Resistance
  • Performance Traits: Superior Starting Power and Deep Cycle Capacity
  • Condition: Brand New, Factory Fresh
  • Warranty: 6 Month Warranty
  • Terminal Type: Nut & Bolt
  • Brand(s) Mentioned: SigmasTek, Kawasaki
  • Application Focus: High rate discharge applications

Benefits

  • Durability: AGM construction and valve-regulated design offer robust protection against vibration, temperature extremes, and the rigors of marine environments.
  • Long Life: Maintenance-free design and superior deep-cycle capacity help extend useful life compared with conventional flooded batteries, making this a long-lasting battery option for seasonal watercraft.
  • High Performance: Specifically optimized for high-rate discharge applications, delivering the burst of power required for quick starts and heavy load situations on jet skis.
  • Safety & Convenience: Spillproof, leakproof, and maintenance-free—no acid filling or regular topping up—so you can focus on riding rather than upkeep.
  • Typical Applications: Ideal for personal watercraft starting, emergency backup power on boats, and compact high-drain tool applications where brief high power output is required.
  • Tested Quality: Each battery is professionally tested and packaged to ensure dependable performance out of the box.

If you need a reliable, high-performance replacement battery for your Kawasaki JS400 (1976), this 12V 18Ah AGM unit delivers strong starting power, durable construction, and maintenance-free convenience. It’s an excellent choice for riders who want dependable performance on the water.

Don’t wait—secure your Kawasaki JS400 replacement battery today and enjoy a long-lasting battery that keeps you running season after season.


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