Welcome to our store. Proudly serving customers across North America for years. Learn more

For support or quotes: sales@batteryweb.com

WELCOME10
SigmasTek  |  SKU: BW-18511

SigmasTek ST5L-BS High Performance Compatible Replacement Battery 4.15 lb

13% off
Sale price $33.99 USD Regular price $38.99
Shipping calculated at checkout.
Maintenance-free AGM design eliminates the need for acid refills
Spillproof and leakproof for safe, worry-free use
U.L. recognized and CE certified for guaranteed quality
Superior starting power with excellent deep cycle capacity
Resistant to extreme heat, freeze, and vibration conditions
In stock

— Ready to ship immediately

Free shipping

Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe

Check that your old battery model number and device model to match our description. This makes sure they work together.


We ship your order same day if you buy it before 4 PM EST.

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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.


Volts & Amps

12 Volts | 4.5 AH

Terminal Type

Nut & Bolt

SigmasTek ST5L-BS 12 Volt 4.5 AH Replacement Battery (Genuine) for Motorcycles

The genuine SigmasTek ST5L-BS 12 Volt 4.5 AH replacement battery is purpose-built for motorcycles and other small powersport applications that demand reliable starting power and maintenance-free operation. As an AGM maintenance-free battery, the ST5L-BS removes the need for acid filling and delivers steady performance, making it a top choice for riders looking to restore reliable starts and consistent electrical output. This high-performance battery provides the efficiency and longevity riders expect from a quality OEM-style replacement.

Key Specifications

  • Model: SigmasTek ST5L-BS
  • Voltage: 12 Volts
  • Amperage / Capacity: 4.5 AH
  • Design: AGM Maintenance Free (Absorbed Glass Mat Design)
  • Features: Maintenance-Free, Spillproof and Leakproof, Valve Regulated Vent System
  • Certifications: U.L. Recognized and CE Certified
  • Durability: Extreme Freeze, Heat and Vibration Resistance
  • Performance: Superior Starting Power and Deep Cycle Capacity
  • Condition: Brand New, Factory Fresh (Genuine SigmasTek)
  • Warranty: 6 Month Warranty
  • Terminal: Nut & Bolt
  • Brand: SigmasTek

Benefits

  • Durability: Built to resist vibration and thermal stress from motorcycle operation, this replacement battery is constructed to deliver extended life in real-world riding conditions.
  • Long Life & Low Maintenance: The AGM architecture ensures stable electrolyte containment and low self-discharge, creating a long-lasting battery solution with minimal upkeep.
  • High Performance: Provides strong cranking power and rapid recovery after starting—ideal for motorcycles that require reliable ignition and consistent electrical supply for lights and electronics.
  • Versatile Applications: While optimized for motorcycles, the ST5L-BS’s reliability and deep-cycle capability also make it suitable for small UPS systems, emergency power in compact devices, and portable tools where a compact 12V battery is required.
  • Convenience & Safety: Maintenance-free, spillproof design and certified construction (U.L. and CE) make this battery safe to handle and install, reducing the risk of leaks or corrosive maintenance issues.
  • Genuine Quality: As an authentic SigmasTek unit, it matches OEM performance expectations and fitment for compatible models, delivering peace of mind to riders.

Restore dependable starts and reliable electrical performance with the genuine SigmasTek ST5L-BS 12V 4.5AH replacement battery. Order now to secure a high-performance, long-lasting battery that fits your motorcycle and arrives ready to install—purchase today.

Technical Specifications

Voltage12 Volts
Amp Hours4.5 AH
Terminal TypeNut & Bolt
Cold Cranking Amps (CCA)80
Length (in.)4.49
Width (in.)2.8
Height (in.)4.21
Weight (lb.)4.15

Product Highlights

  • Brand Replacement : SigmasTek
  • Manufacturer: SigmasTek
  • Product Type: Motorcycle
  • Warranty: 6 Months
  • Bulk Orders: sales@batteryweb.com

Connections & Interface

  • Polarity: "'-/+"

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.


🔋 Battery Finder
🔋
Battery Assistant AI
Online — BatteryWeb.com