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SigmasTek  |  SKU: BW-17289

STX20L-BS High Performance Replacement Battery for Yamaha YFM660FW Grizzly ATV (1998-2006)

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

➤ Direct replacement for Yamaha YFM660FW Grizzly (1998-2006)

➤ Meets or exceeds OEM specs for reliable starting power

➤ Factory activated and ready for immediate installation

➤ Durable, spill-proof, and maintenance-free design

➤ Provides consistent 12V and 18Ah power for tough off-road use


📦🚀 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

STX20L-BS Replacement Battery — Yamaha YFM660FW Grizzly (1998-2006)

Upgrade your Yamaha YFM660FW Grizzly (1998-2006) with the STX20L-BS replacement battery engineered for reliable starting power and dependable off-road performance. This high-quality, high-performance battery is designed to provide a perfect fit and consistent power delivery for your ATV, combining factory activation with a maintenance-free, spill-proof design for maximum convenience and reliability in rugged conditions.

Key Specifications

  • Product: STX20L-BS
  • Compatible Model: Yamaha YFM660FW Grizzly (1998-2006)
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal Type: Nut & Bolt
  • Factory activated and ready to install
  • Meets or exceeds OEM specifications
  • Spill-proof and maintenance-free design
  • Durable construction for demanding ATV applications
  • Direct replacement for Yamaha YFM660FW Grizzly

Benefits

The STX20L-BS offers long-lasting battery life and exceptional reliability under the stresses of trail riding and heavy use. Built with a durable construction that resists vibration and impact, this battery is a top choice for riders who need consistent starting power in all conditions. As a maintenance-free and spill-proof unit, it reduces upkeep and eliminates the mess associated with traditional batteries, making it simple to install and maintain.

This high-performance battery delivers dependable cold-cranking ability and consistent voltage output, ensuring fast starts and reliable electrical performance for lights, winches, and accessories. It meets or exceeds OEM specifications for fit and function, so you get a true direct replacement that retains factory-level reliability. Whether you use your Grizzly for work, recreation, or utility tasks, this STX20L-BS battery provides the robust power reserve you need.

Beyond ATV use, this long-lasting battery is suitable for related applications that require stable 12V power and a compact footprint. It is a solid option for backup power, small equipment, and any application requiring a sealed, maintenance-free battery.

Choose the STX20L-BS replacement battery for proven performance and confidence on every ride. Order now to restore reliable starting power to your Yamaha YFM660FW Grizzly and enjoy hassle-free installation and durable performance.


Payment & Security

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