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SigmasTek  |  SKU: BW-8812

Invacare M61 High Performance Wheelchair Replacement Battery 49.45 lb

22% off
New arrival
Sale price $245.99 USD Regular price $314.99
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Factory fresh replacement batteries for Invacare M61 wheelchair
100% compatible with Invacare M61 units requiring SP12-35 NB (12V 35AH)
AGM technology with valve regulated, spill-proof design for safety
Deep cycle use ensures long-lasting power and reliable performance
U.L. recognized, CE certified, and backed by a 1-year warranty
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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

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.


Volts & Amps

12 Volts | 35 AH

Terminal Type

Nut & Bolt

Replacement Invacare M61 Wheelchair Battery — Compatible with Invacare M61 (SP12-35 NB, 12V 35AH)

Upgrade your mobility with this factory-fresh replacement battery engineered specifically for the Invacare M61. Designed for reliable performance, these Invacare M61 replacement batteries deliver the deep-cycle capacity and safe construction you expect from a high-quality power source. If your Invacare M61 requires two SP12-35 NB units, these 12V 35AH batteries are 100% compatible and provide dependable, long-lasting battery power for daily use and extended outings.

Key Specifications

  • Brand: SigmasTek
  • Compatible Model: Invacare M61
  • Battery Model: SP12-35 NB
  • Voltage: 12 Volts
  • Capacity: 35 AH
  • Quantity Required: 2 batteries (per wheelchair)
  • Technology: Absorbent Glass Mat (AGM)
  • Usage Type: Designed for Deep Cycle Usage
  • Construction: Valve Regulated, Spill Proof
  • Terminal Type: Nut & Bolt
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year
  • Performance: Performance Guaranteed

Benefits

These replacement Invacare M61 batteries combine AGM technology and a valve-regulated construction to deliver a rugged, spill-proof power solution ideal for mobility devices. The deep-cycle design supports consistent discharge and recharge cycles, giving you a long-lasting battery that maintains capacity over time. As a high-performance battery option, it offers an excellent power-to-volume ratio for outstanding energy density — translating to longer run times for wheelchairs and power chairs.

Durability is built in: the sealed AGM design resists vibration and minimizes maintenance, while UL and CE recognition provide confidence in safety and manufacturing quality. Because they are factory fresh and performance guaranteed, these units are an excellent choice when you need dependable backup power. Typical applications include electric wheelchairs, power chairs, mobility chairs, and mobility scooters — and they can also serve in some UPS and emergency power scenarios where a long-lasting battery is required.

Installation is straightforward when replacing existing batteries: you should use all existing cables and hardware from your original setup to connect the new units. For additional assistance, customer service is available at or by e-mail.

Ready to restore mobility with a reliable, high-performance battery? Order your replacement Invacare M61 SP12-35 NB batteries today for a dependable, long-lasting battery solution and fast shipping.

Technical Specifications

Voltage12 Volts
Amp Hours35 AH
Terminal TypeNut & Bolt
Length (in.)7.72
Width (in.)5.14
Height (in.)6.22
Weight (lb.)49.4

Product Highlights

  • Brand Replacement : Invacare M61 Wheelchair
  • Manufacturer: SigmasTek
  • Product Type: Medical Equipment Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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