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SigmasTek  |  SKU: BW-19175

Harley-Davidson FLS Softail (Slim S, Fat Boy S) 1803CC (2016-2017) High-Performance Replacement Battery

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

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

➤ Spillproof and leakproof construction for safe handling

➤ U.L. recognized and CE certified for quality assurance

➤ Superior starting power with deep cycle capacity for reliable performance

➤ Extreme resistance to freeze, heat, and vibration 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

Harley-Davidson 1803CC FLS (SOFTAIL SLIM S, FAT BOY S), 2016-2017 Replacement Battery

Designed to fit Harley-Davidson 1803CC FLS models (Softail Slim S and Fat Boy S) for 2016-2017, this replacement battery combines reliable cranking power with the convenience of AGM maintenance-free design. Built to perform under hot, cold and high-vibration conditions, it delivers the dependable starts and consistent electrical support riders expect from a high-performance battery tailored to modern motorcycles.

Key Specifications

  • AGM Maintenance Free
  • Maintenance-Free Design
  • Spillproof and Leakproof Design
  • U.L. Recognized and CE Certified
  • Absorbed Glass Mat Design
  • Valve Regulated Vent System
  • Extreme Freeze, Heat and Vibration Resistance
  • Superior Starting Power and Deep Cycle Capacity
  • Brand New, Factory Fresh
  • 6 Month Warranty
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal Type: Nut & Bolt
  • Compatible Brand: Harley-Davidson

Benefits

This replacement battery delivers a blend of durability, performance and low-maintenance operation. The Absorbed Glass Mat construction provides superior starting power and improved deep cycle capacity, helping the battery handle frequent starts and accessory loads common on customized Softail models. As a long-lasting battery solution, it reduces the need for frequent replacements and minimizes downtime for riders who demand consistent readiness.

Maintenance-free and spillproof, the battery is safe for installation in tight motorcycle compartments and eliminates the need to add acid or check fluid levels. The valve regulated vent system ensures safe operation and extends service life, while U.L. recognition and CE certification reflect industry-recognized safety and quality standards. The battery’s resistance to extreme freeze, heat and vibration makes it especially well suited for variable climates and aggressive riding styles.

Although optimized for motorcycles, this high-performance battery can also serve in applications that require a compact, dependable power source—such as emergency backup circuits and portable systems—when the form factor and terminals are appropriate. Professional testing and factory-fresh condition guarantee you receive a reliable unit ready to install.

Don’t wait to restore peak performance to your bike. Purchase this Harley-Davidson 1803CC FLS (SOFTAIL SLIM S, FAT BOY S), 2016-2017 replacement battery now and enjoy a maintenance-free, high-performance battery that keeps you riding. Add to cart for fast shipping and trusted quality.


Payment & Security

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