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SigmasTek  |  SKU: BW-18020

STX20L-BS for Kawasaki JS550 SX (1986) High Performance Replacement Battery 11.62 lb

24% off
Sale price $75.99 USD Regular price $99.99
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Exact fit for Kawasaki JS550 SX 1986 model
Meets or exceeds OEM specifications for reliable performance
12V 18Ah capacity ensures strong, consistent starting power
Maintenance-free and spill-proof design for hassle-free use
Enhanced vibration resistance for durability in marine environments
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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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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


Volts & Amps

12 Volts | 18 Ah

Terminal Type

Nut & Bolt

STX20L-BS Replacement Battery for Kawasaki JS550 SX (1986)

Upgrade your Kawasaki JS550 SX (1986) with this STX20L-BS replacement battery, engineered for reliable starts, rugged durability, and maintenance-free operation in marine environments. Built to meet or exceed OEM specifications, this high-performance battery gives your Personal Watercraft consistent cranking power and enhanced vibration resistance for a hassle-free installation and dependable on-water performance.

Key Specifications

  • Compatible Model: Kawasaki JS550 SX (1986)
  • Battery Model: STX20L-BS
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal Type: Nut & Bolt
  • Maintenance-Free Technology
  • Spill-proof and Leak-proof Design
  • Enhanced Vibration Resistance for Marine Applications
  • Durable Construction for Extended Lifespan
  • Meets or Exceeds OEM Specifications

Benefits

  • Durability: Built to withstand the high-vibration, moisture-prone marine environment, this replacement battery ensures reliable service with reduced risk of failure due to shock or movement.
  • Long Life: Maintenance-free construction and rugged materials deliver a long-lasting battery solution that minimizes upkeep so you can focus on enjoying time on the water.
  • High Performance: With 12V and 18Ah capacity, the STX20L-BS supplies strong starting current and consistent power delivery for ignition systems and accessory loads.
  • Safety & Convenience: The spill-proof, leak-proof design allows secure, worry-free installation and safe operation in confined marine battery compartments.
  • Versatile Applications: While optimized for the Kawasaki JS550 SX, this high-performance battery is also well suited for small emergency power needs, portable tools, and compact UPS systems that accept similar form factors and electrical specs.
  • Hassle-Free Replacement: Direct-fit design and OEM-equivalent specifications make swapping your old battery simple and quick.

Don’t let a weak battery cut your day short. Replace your Kawasaki JS550 SX (1986) battery with this STX20L-BS high-performance, long-lasting battery today — order now for fast shipping and dependable on-water starts.

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

  • Manufacturer: SigmasTek
  • Product Type: Powersport Batteries
  • Warranty: 6 Months
  • Bulk Orders: sales@batteryweb.com

Connections & Interface

  • Polarity: "'-/+"

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