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SigmasTek  |  SKU: BW-19189

Duralast CTX20L-BS FP Compatible Replacement Battery

Sale price $64.60 USD Regular price $82.13
Shipping calculated at checkout.

➤ Maintenance-free AGM design eliminates the need for acid filling

➤ Spillproof and leakproof for safe, hassle-free handling

➤ U.L. recognized and CE certified for reliable quality and safety

➤ Superior starting power with deep cycle capacity for high performance

➤ Resistant to extreme freeze, heat, and vibrations for durability


📦🚀 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

Replacement Duralast CTX20L-BS FP Motorcycle Battery - Compatible Model CTX20L-BS FP

Designed as a direct, high-quality replacement battery for the Duralast CTX20L-BS FP, this AGM maintenance-free unit delivers reliable starting power and consistent performance for motorcycles and similar high-discharge applications. Whether you ride daily or store your bike seasonally, this replacement battery offers dependable cold-cranking ability, exceptional vibration resistance, and the peace of mind that comes with a factory-fresh, fully tested product. Built for riders who demand a high-performance battery and a long-lasting battery life, this unit removes the hassle of acid filling while providing spillproof, maintenance-free operation.

Key Specifications

  • Maintenance-Free Design
  • Spillproof and Leakproof Design
  • U.L. Recognized and CE Certified
  • Absorbed Glass Mat Design (AGM)
  • Valve Regulated Vent System
  • Extreme Freeze, Heat and Vibration Resistance
  • Superior Starting Power and Deep Cycle Capacity
  • Brand New, Factory Fresh
  • 6 Month Warranty
  • Model: Duralast CTX20L-BS FP
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal: Nut & Bolt
  • Brand: Duralast
  • Manufacturer/Distributor reference: SigmasTek

Benefits

This replacement battery is engineered to deliver robust starting power while offering deep cycle capacity for accessories and intermittent loads. The Absorbed Glass Mat (AGM) construction makes it a true high-performance battery: it resists vibration, tolerates extreme temperatures, and prevents spills under normal use. Riders will appreciate the maintenance-free design that eliminates topping up acid and simplifies handling. The valve regulated vent system enhances safety and reliability, while U.L. recognition and CE certification confirm compliance with stringent safety standards.

Durability and long life are core advantages: the AGM design and heavy-duty internal construction reduce sulfation and self-discharge, extending usable life compared to conventional flooded batteries. This long-lasting battery is ideal for motorcycles, sport bikes, cruisers, and ATVs that demand high-rate discharge and rapid power delivery. Beyond two-wheel use, its rugged construction and dependable output make it suitable for small emergency power needs, backup devices, and portable tools where a compact, sealed battery is preferred.

Installation is straightforward thanks to nut & bolt terminals and a form factor designed to match CTX20L-BS FP specifications. Each battery is professionally tested and packaged to ensure consistent quality and ready-to-install condition right out of the box.

Ready to upgrade? Order this replacement battery today and enjoy the combination of superior starting performance, maintenance-free convenience, and a long-lasting battery life. Buy now with confidence and get fast shipping on in-stock items.


Payment & Security

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