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SigmasTek  |  SKU: BW-17296

STX20L-BS High Performance Replacement Battery for Yamaha YFM40FB Big Bear (2000-2012)

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

➤ Direct OEM replacement for Yamaha YFM40FB Big Bear (2000-2012)

➤ Guaranteed perfect fit for easy, hassle-free installation

➤ Meets or exceeds OEM specs for reliable, long-lasting power

➤ High Cold Cranking Amps (CCA) for strong starts in all weather

➤ Maintenance-free design built to withstand tough ATV 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.
🔹 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 Battery — Replacement for Yamaha YFM40FB Big Bear (2000-2012)

Upgrade the starting power of your Yamaha YFM40FB Big Bear (2000-2012) with the STX20L-BS replacement battery. Designed as a direct OEM replacement, this high-performance battery delivers consistent, dependable starts and is engineered to meet or exceed original equipment specifications. Whether you ride for work or recreation, this battery provides the reliability and long-lasting battery life needed for off-road conditions and seasonal use.

Key Specifications

  • Model: STX20L-BS
  • Compatible Models: Yamaha YFM40FB Big Bear (2000-2012)
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal Type: Nut & Bolt
  • Brand: SigmasTek
  • Direct OEM replacement
  • Guaranteed fit for hassle-free installation
  • Meets or exceeds OEM specifications
  • High CCA for powerful starting in all weather conditions
  • Maintenance-free design

Benefits

The STX20L-BS long-lasting battery offers rugged construction and design features that enhance durability and service life in the rough conditions Big Bear riders encounter. Built to deliver reliable cranking and high cold-cranking ability, it provides quick, consistent starts even in cold weather or after periods of storage. Its maintenance-free nature reduces routine service and helps minimize ownership hassle—perfect for owners who prefer to focus on riding rather than upkeep.

As a high-performance battery, it supports heavy use and consistently supplies the power needed to start the engine, run lights, and support small accessories. Typical applications include primary starting for all-terrain vehicles, standby power for emergency starts, and use in workshops or garages where a dependable battery is needed to test or maintain machines. The exact-fit and OEM-grade construction mean installation is straightforward and dependable.

Whether you are replacing an aged battery or equipping a rebuilt machine, the STX20L-BS replacement battery delivers trustworthy performance and extended life, making it a dependable choice for your Yamaha Big Bear.

Ready to improve starting reliability? Add the STX20L-BS high-performance replacement battery to your cart now and ensure your Big Bear starts strong for every ride.


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