Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com

WELCOME5
SigmasTek  |  SKU: BW-9259

Merits Pioneer 4 S145 High Performance Wheelchair Replacement Battery 58.27 lb

17% off
New arrival
Sale price $289.99 USD Regular price $347.99
Shipping calculated at checkout.
Factory fresh Merits Pioneer 4 S145 batteries for reliable performance
100% compatible with Merits Pioneer 4 S145 wheelchair models
Absorbent Glass Mat (AGM) technology for deep cycle usage
Valve regulated, spill-proof design ensures safety and durability
Includes 1-year warranty for peace of mind and guaranteed quality
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 | 40 Ah

Terminal Type

Nut & Bolt

Merits Pioneer 4 S145 Replacement Battery - Compatible with Merits Pioneer 4 S145

Get reliable power for your Merits Pioneer 4 S145 with a factory-fresh replacement battery designed for peak performance and long-term reliability. These SP12-40 NB batteries are 100% compatible with your Merits Pioneer 4 S145 and deliver deep cycle performance, safety certifications, and the maintenance-free convenience mobility users expect.

Key Specifications

  • Model Compatibility: Merits Pioneer 4 S145
  • Required Quantity: 2 batteries (SP12-40 NB)
  • Voltage: 12 Volts
  • Amp-Hours: 40 Ah
  • Terminal Type: Nut & Bolt
  • Battery Technology: Absorbent Glass Mat (AGM)
  • Designed For: Deep cycle usage
  • Construction: Valve regulated, spill proof
  • Energy Density: High power/volume ratio
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand new, factory fresh
  • Performance: Performance guaranteed
  • Brand: SigmasTek
  • Warranty: 1 Year Warranty

Benefits

These replacement batteries are engineered for durability and consistent output. The AGM construction ensures a sealed, maintenance-free design that resists vibration and minimizes the risk of acid leakage, delivering a safe and reliable power source for everyday mobility. As a high-performance battery tailored for deep cycle use, it sustains dependable voltage during extended operation and recovers efficiently when recharged.

Expect a long-lasting battery life that supports longer outings and dependable starts. The high energy density provides more usable power in a compact package, making this replacement battery a smart choice for electric wheelchairs, power chairs, mobility chairs, and mobility scooters. Additionally, the same robust characteristics make these batteries suitable for UPS systems, emergency backup power, and select portable tools where rugged deep cycle performance is needed.

These batteries come brand new, are UL and CE certified, and include a one-year warranty with a performance guarantee. For any Merits Pioneer 4 S145 unit calling for SP12-40 NB (12 V 40 AH), this SigmasTek replacement is a direct, reliable swap—reuse your existing cables and hardware for installation.

Ready to upgrade to a dependable, long-lasting battery? Purchase this Merits Pioneer 4 S145 replacement battery today and keep your mobility device performing at its best.

Technical Specifications

Voltage12 Volts
Amp Hours40 Ah
Terminal TypeNut & Bolt
Length (in.)7.76
Width (in.)6.5
Height (in.)6.69
Weight (lb.)58.22

Product Highlights

  • Brand Replacement : Merits Pioneer 4
  • Manufacturer: SigmasTek
  • Product Type: Medical Equipment Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • 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.