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SigmasTek  |  SKU: BW-18094

STX20HL-BS 12V 19AH Battery for Kawasaki JS300 TS 1986-1991 High Performance

Sale price $75.99 USD Regular price $104.04
Shipping calculated at checkout.

➤ Designed specifically for Kawasaki JS300 TS (1986-1991) models

➤ Meets or exceeds OEM specifications for reliable starting power

➤ 12V 19AH capacity ensures strong and consistent performance

➤ Maintenance-free design offers long-lasting durability

➤ Superior vibration resistance ideal for tough marine 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

STX20HL-BS 12V 19AH Replacement Battery for Kawasaki JS300 TS (1986-1991)

Upgrade your Kawasaki JS300 TS (1986-1991) with this high-performance replacement battery engineered to deliver reliable starting power and consistent performance in the demanding marine environment. Designed to meet or exceed OEM specifications, the STX20HL-BS provides dependable cranking ability and a long-lasting battery solution that resists vibration, moisture, and corrosion common on personal watercraft. Whether you ride for recreation or rely on your Jet Ski for recreation and safety, this maintenance-free unit offers the performance and reliability your Kawasaki needs.

Key Specifications

  • Model: STX20HL-BS
  • Compatible with: Kawasaki JS300 TS (1986-1991)
  • Voltage: 12V
  • Capacity: 19AH (also referenced as 12 Volts 18 Ah in product listing)
  • Chemistry/Type: Maintenance-free, sealed lead-acid (AGM-style maintenance-free)
  • Design: Leak-proof and spill-proof
  • Vibration resistance: Superior vibration resistance for marine use
  • Fitment: Direct replacement for OEM battery — perfect fit and hassle-free installation
  • Brand: SigmasTek
  • Terminal type: Nut & Bolt

Benefits

  • Durability: Maintenance-free construction and a leak-proof design protect internal plates and terminals from corrosion and the harsh marine environment, delivering extended reliable service life.
  • Long life: Built to meet or exceed OEM specifications, this long-lasting battery minimizes replacement frequency, keeping your personal watercraft ready season after season.
  • High performance: The STX20HL-BS provides strong cranking power for cold starts and rapid restarts, ensuring fast, reliable ignition whether you’re on a calm lake or rough open water.
  • Vibration resistance: Enhanced resistance to vibration reduces the risk of internal damage during aggressive riding and rough-water conditions commonly experienced by Jet Skis.
  • Maintenance-free convenience: No need to add water or monitor electrolyte levels—this replacement battery arrives ready to install and operate, saving time and hassle.
  • Typical applications: Ideal for personal watercraft, jet skis, and small marine craft requiring a dependable starting battery. Also suitable where a compact, maintenance-free power source is needed for bilge pumps, navigation electronics, or portable marine accessories.
  • Perfect fit: As a direct replacement for the original Kawasaki battery, installation is straightforward and secure, keeping electrical connections tight and reliable.

Choose this STX20HL-BS replacement battery for a high-performance battery option that delivers dependable crank power, long-lasting battery life, and marine-ready durability for your Kawasaki JS300 TS (1986-1991). Order now to restore reliable starts and enjoy worry-free rides—purchase today and get back on the water with confidence.


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