STX20L-BS for Harley-Davidson FXDF Dyna Fat Bob (2008-2013) High Performance Replacement Battery
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Battery Care Guide
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
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.
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⚡ 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
⚠️ 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 for Harley-Davidson FXDF Dyna Fat Bob (2008-2013)
Upgrade your Harley-Davidson FXDF Dyna Fat Bob (2008-2013) with this STX20L-BS replacement battery designed to meet or exceed OEM specifications. This maintenance-free, rugged battery offers reliable cranking power, spill-proof protection, and resistance to vibration and extreme temperatures — delivering the dependable performance riders need on the road.
Key Specifications
- Compatible Model: Harley-Davidson FXDF Dyna Fat Bob (2008-2013)
- Battery Model: STX20L-BS
- Battery Type: Maintenance-free (AGM-style performance)
- Design Features: Spill-proof and leak-proof design; maintenance-free technology
- Performance: Superior cranking power for reliable starts; resistant to vibrations and extreme temperatures
- Fitment: Exact fit for specified Harley-Davidson model
- Brand: SigmasTek (replacement)
- Voltage: 12 Volts
- Capacity: 18 Ah
- Terminal Type: Nut & Bolt
Benefits
This STX20L-BS is engineered for durability and reliable starting in all riding conditions. The maintenance-free design means no electrolyte topping or acid handling — simply install and ride. Its spill-proof construction and robust case make it suitable for aggressive riding, extended highway runs, and exposure to temperature extremes. The battery’s strong cranking performance ensures consistent starts even after long periods of storage or in cold weather, while the vibration-resistant construction protects internal components from premature wear.
As a high-performance battery replacement, the STX20L-BS offers a long-lasting battery life compared to conventional wet-cell designs. Typical applications include motorcycle starting systems, auxiliary power for aftermarket accessories, and emergency back-up for key 12V circuits on your bike. Riders who want OEM fit and confidence without dealing with routine maintenance will value the convenience and reliability this battery provides.
Give your Harley the dependable power it deserves — purchase this STX20L-BS replacement battery today. Orders for in-stock items typically ship within 24 hours; buy now to restore reliable starts and enjoy worry-free riding.
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