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SigmasTek  |  SKU: BW-18086

STX20HL-BS 12V 19AH Battery for Kawasaki JS550 SX 1986-1995 High Performance

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

➤ Direct replacement for Kawasaki JS550, SX (1986-1995) OEM battery

➤ Maintenance-free design for long-lasting, hassle-free use

➤ 12V 19AH capacity delivers reliable starting power every time

➤ Spill-proof and leak-proof for safe and clean installation

➤ Durable construction resists vibration and harsh marine environments


📦🚀 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.
🔹 We only supply the batteries shown in the images. Device images are provided for reference only.

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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 Battery — Kawasaki JS550, SX (1986-1995)

Upgrade your Kawasaki JS550, SX (1986-1995) with the STX20HL-BS 12V 19AH replacement battery. Designed for direct fit and reliable starting performance in personal watercraft, this high-performance battery provides marine-grade durability and maintenance-free convenience so you can focus on the ride instead of battery upkeep.

Key Specifications

  • Model: STX20HL-BS
  • Compatible Model: Kawasaki JS550, SX (1986-1995)
  • Voltage: 12V
  • Amp Hours: 19AH
  • Alternate Amp Hours listed: 18 Ah (appears in product text)
  • Brand: SigmasTek
  • Terminal Type: Nut & Bolt
  • Maintenance: Maintenance-free technology
  • Design: Spill-proof and leak-proof
  • Application: Designed for Personal Watercraft (Jet Ski)
  • Fitment: Direct replacement for OEM, meets or exceeds OEM specifications
  • Construction: Rugged construction to withstand vibration and harsh marine conditions

Benefits

This STX20HL-BS long-lasting battery gives dependable starting power season after season. Its maintenance-free and spill-proof design makes installation safe and straightforward, while rugged construction helps it tolerate the rough conditions of marine use. As a high-performance battery designed for personal watercraft, it provides fast and reliable cranking power to your JS550 or SX model.

Durability: Built to withstand vibration and moisture exposure found in marine environments, reducing the risk of early failure. Long Life: Maintenance-free design and superior internal construction extend usable life compared to many conventional lead-acid batteries. High Performance: 12V 19AH capacity ensures reliable starting power for your 550cc engine and consistent support for onboard electronics. Typical applications for a battery of this type include personal watercraft starting systems, small recreational vehicles, and other compact high-drain uses where a dependable, long-lasting battery is required. It also works well as a compact backup for small emergency power tasks or hobby electronics where a robust rechargeable source is needed.

Ready to restore factory-fit reliability to your Kawasaki JS550 or SX? Order this STX20HL-BS replacement battery today and enjoy the peace of mind that comes with a high-performance, long-lasting battery.


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