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-20035

Mainstream MS12B High Performance Replacement Battery 9.01 lb

21% off
Sale price $53.99 USD Regular price $67.99
Shipping calculated at checkout.
Maintenance-free AGM design eliminates the need for acid filling
Spillproof and leakproof for safe, hassle-free use
U.L. recognized and CE certified for reliable quality
Superior starting power with deep cycle capacity for motorcycles
Extreme resistance to freeze, heat, and vibration ensures durability
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 | 10 Ah

Terminal Type

Nut & Bolt

Replacement Mainstream MS12B Motorcycle Battery — Compatible MS12B

Designed as a direct-fit replacement for the Mainstream MS12B, this AGM maintenance-free battery provides dependable performance and easy installation for riders who expect consistent power without the hassle of maintenance. The SigmasTek MS12B replacement delivers high cranking performance, strong vibration resistance, and leakproof construction—making it a trustworthy choice when you need a high-performance battery for your motorcycle.

Key Specifications

  • Compatibility: Replacement for Mainstream MS12B
  • Battery Type: AGM Maintenance Free (Absorbed Glass Mat Design)
  • Voltage: 12 Volts
  • Capacity: 10 Ah
  • Terminal Type: Nut & Bolt
  • Design: Maintenance-Free; Spillproof and Leakproof Design
  • Certifications: U.L. Recognized and CE Certified
  • Vent System: Valve Regulated Vent System
  • Durability: Extreme Freeze, Heat and Vibration Resistance
  • Performance: Superior Starting Power and Deep Cycle Capacity
  • Condition: Brand New, Factory Fresh
  • Warranty: 6 Month Warranty
  • Brand: SigmasTek (replacement for Mainstream)

Benefits

The Mainstream MS12B replacement combines the practical advantages of AGM technology with rugged construction designed for powersports. As a maintenance-free battery, it eliminates the need for electrolyte topping and reduces the risk of spills, giving you a safer, cleaner power source. The absorbed glass mat design helps provide rapid discharge capability for strong starts and the reserve capacity to handle accessories and intermittent loads.

Where durability matters—on street bikes, off-road machines, and scooters—this battery’s extreme freeze, heat, and vibration resistance keeps electrical performance steady under demanding conditions. Its valve-regulated vent system and certified safety credentials (U.L. recognized and CE certified) ensure reliability and compliance with industry standards. You’ll get a high-performance battery that’s engineered for both quick bursts of cranking power and reliable deep-cycle support.

Typical applications include motorcycle starters, emergency backup for small electronics, and other powersports electrical systems requiring a compact, long-lasting battery. The 12V/10Ah rating and nut-and-bolt terminals make this MS12B replacement suitable for many OEM replacements where a Mainstream MS12B is specified.

Buy this replacement battery for the Mainstream MS12B today and enjoy the convenience of a long-lasting battery backed by professional testing and a 6 month warranty. Add to cart now for fast shipping and dependable performance.

Technical Specifications

Voltage12 Volts
Amp Hours10 Ah
Terminal TypeNut & Bolt
Cold Cranking Amps (CCA)210
Length (in.)5.93
Width (in.)2.75
Height (in.)5.12
Weight (lb.)9.0

Product Highlights

  • Brand Replacement : Mainstream
  • 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