STX20L-BS High Performance Replacement Battery For Kawasaki Jet Ski JS550 1982-1985
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Battery Care Guide
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
Delivery and Shipping
⚡ Everything You Need to Know About Shipping with BatteryWeb (USA)
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🚚 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
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Disclaimer
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
STX20L-BS Replacement Battery — Kawasaki Jet Ski JS550 (1982-1985)
Improve the starting reliability and overall electrical performance of your Kawasaki JS550 (1982-1985) with the STX20L-BS replacement battery. This sealed AGM, maintenance-free battery is engineered to meet or exceed OEM specifications and is ideal for personal watercraft where splash, vibration, and environmental exposure demand rugged, dependable power. If you want a high-performance battery that resists the challenges of marine use, the STX20L-BS delivers.
Key Specifications
- Compatible Model: Kawasaki JS550 Jet Ski (1982-1985)
- Model: STX20L-BS
- Brand: SigmasTek
- Voltage: 12 Volts
- Capacity: 18 Ah
- Terminal Type: Nut & Bolt
- Design: Sealed AGM (Absorbed Glass Mat), maintenance-free
- Safety: Sealed and spill-proof for marine environments
- Performance Feature: High CCA for reliable starting power in cold or wet conditions
- Durability: Built to withstand marine vibration and extended service life
Benefits
This STX20L-BS long-lasting battery is designed with the specific needs of personal watercraft in mind. The sealed AGM design prevents spills and reduces corrosion risk, making it well-suited to the damp, salty, and vibration-prone environment of jet skis. Maintenance-free operation removes the hassle of fluid checks and refills, while robust construction helps ensure dependable starts even after periods of storage or exposure to cold conditions.
As a high-performance battery, the STX20L-BS provides the high current needed for quick, reliable starts and supports the intermittent high-rate discharges that jet ski engines require. The high CCA characteristic helps ensure reliable ignition in a variety of temperatures and conditions. For riders who expect consistent starting behavior and durable service life, this replacement battery offers substantial performance advantages over older or weakened units.
Installation is straightforward due to its direct-fit design and standard terminal layout. Whether you’re replacing a failing battery or upgrading for better reliability, this unit is a practical choice for maintaining peak performance on the water.
Get back on the water with confidence—buy the STX20L-BS replacement battery for your Kawasaki JS550 today and enjoy a high-performance, long-lasting battery engineered for marine reliability.
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