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SigmasTek  |  SKU: BW-18061

STX20L-BS Harley-Davidson FLS Softail (2016-2017) High-Performance Battery

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

➤ Exact fit for Harley-Davidson FLS Softail (2016-2017) models

➤ Maintenance-free design for hassle-free use

➤ Superior cranking power ensures reliable engine starts

➤ Spill-proof and leak-proof for safe operation

➤ Enhanced vibration resistance for tough riding 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 for Harley-Davidson FLS Softail (2016-2017) Replacement Battery

Replace the factory battery in your Harley-Davidson FLS Softail (2016-2017) with this STX20L-BS maintenance-free replacement battery designed for a perfect fit and dependable performance. Engineered to meet or exceed OEM specifications, this sealed AGM battery provides superior cranking power, excellent vibration resistance, and a spill-proof design for safe, worry-free operation on the road.

Key Specifications

  • Compatibility: Harley-Davidson FLS Softail (2016-2017)
  • Model: STX20L-BS
  • Design: Maintenance-free technology
  • Safety: Spill-proof and leak-proof design
  • Performance: Superior cranking power for reliable starts
  • Durability: Enhanced vibration resistance for demanding riding conditions
  • Compliance: Meets or exceeds OEM specifications
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal Type: Nut & Bolt

Benefits

This STX20L-BS replacement battery is built for long life and consistent, high-performance operation. The sealed AGM construction ensures maintenance-free ownership—no acid to add and no need for electrolyte checks—while providing a leakproof package that minimizes corrosion risks. Enhanced vibration resistance helps protect internal plates and connections from damage caused by rough roads and heavy use, so the battery sustains strong starts over time.

Riders will notice improved cold-weather starting and dependable cranking amps that make daily commuting and long rides more reliable. As a long-lasting battery option, it’s well-suited not only to motorcycle starting duties but also to applications that require a compact, stable 12V source—such as portable UPS units, emergency power for small electronics, and power for handheld tools during field repairs. The combination of spillproof safety and OEM-level performance also makes it an excellent choice for riders who expect dependable power with minimal maintenance.

Professionally manufactured and tested to meet strict standards, the STX20L-BS provides a seamless replacement experience with the performance to back it up. If you want a high-performance battery replacement that gives peace of mind and long-term reliability, this model is an ideal choice.

Ready to upgrade? Purchase this STX20L-BS replacement battery for your Harley-Davidson FLS Softail (2016-2017) today and enjoy dependable starts, a long-lasting battery life, and fast shipping.


Payment & Security

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