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SigmasTek  |  SKU: BW-18429

SigmasTek STX20-BS High Performance Replacement Battery 12.07 lb

11% off
Sale price $84.99 USD Regular price $95.99
Shipping calculated at checkout.
Maintenance-free AGM design eliminates the need for acid refills
Spillproof and leakproof construction ensures safe handling
Certified by U.L. and CE for reliable quality and safety
Superior starting power with deep cycle capacity for motorcycles
Resistant to extreme freeze, heat, and vibration for durability
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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.

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⚠️ 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 | 18 Ah

Terminal Type

Nut & Bolt

SigmasTek STX20-BS Motorcycle Battery — Compatible with STX20-BS

The genuine SigmasTek STX20-BS is a premium replacement battery engineered for riders who demand reliable starting power, consistent performance, and maintenance-free operation. Designed to fit motorcycles and other high-rate discharge applications, this high-performance battery delivers the dependable cranking and reserve capacity you expect from a factory-fresh unit. If you need a long-lasting battery that removes the hassle of acid filling and frequent maintenance, the SigmasTek STX20-BS offers a spillproof, sealed AGM solution built for the road.

Key Specifications

  • Model: STX20-BS (SigmasTek STX20-BS)
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal Type: Nut & Bolt
  • Design: Absorbed Glass Mat (AGM) Maintenance-Free
  • Features: Spillproof and Leakproof Design
  • Certifications: U.L. Recognized and CE Certified
  • Vent System: Valve Regulated Vent System
  • Resistance: Extreme Freeze, Heat and Vibration Resistance
  • Performance: Superior Starting Power and Deep Cycle Capacity
  • Condition: Brand New, Factory Fresh
  • Warranty: 6 Month Warranty

Benefits

The SigmasTek STX20-BS is built for durability and long life. Its AGM construction makes it a robust, maintenance-free option that resists spills and leaks while delivering high-performance battery output under demanding conditions. Riders will appreciate superior starting power and deep cycle capability—ideal for frequent cold starts, short bursts of high current, and repeated use. Robust freeze, heat, and vibration resistance protect the battery in harsh environments and extend service life, making it a true long-lasting battery choice.

Beyond motorcycles, this model performs admirably in a range of applications that require reliable energy delivery: small emergency systems, portable UPS units, and power tools that need quick bursts of power. The sealed valve-regulated design and industry certifications give you confidence when using it for critical backup or utility tasks. Whether replacing an OEM cell or upgrading to a higher-reliability option, this high-performance battery combines convenience and power.

Ready to replace your old cell? Buy the genuine SigmasTek STX20-BS replacement battery today and experience dependable starts, superior durability, and maintenance-free ownership. Order now to secure fast shipping and enjoy a high-quality, long-lasting battery backed by our warranty.

Technical Specifications

Voltage12 Volts
Amp Hours18 Ah
Terminal TypeNut & Bolt
Cold Cranking Amps (CCA)270
Length (in.)6.88
Width (in.)3.43
Height (in.)6.13
Weight (lb.)12.06

Product Highlights

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

Connections & Interface

  • Polarity: "'+/-"

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