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SigmasTek  |  SKU: BW-9138

Fortress Scientific 655FS 22NF High Performance Wheelchair Replacement Battery 72.06 lb

26% off
New arrival
Sale price $385.99 USD Regular price $520.99
Shipping calculated at checkout.
Factory fresh and brand new for reliable performance
100% compatible with Fortress Scientific 655FS 22NF wheelchairs
AGM technology ensures deep cycle durability and spill-proof design
High energy density for longer usage between charges
Backed by a 1-year warranty and certified for safety and quality
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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 | 55 AH

Terminal Type

Nut & Bolt

Replacement Fortress Scientific 655FS 22NF Battery - SP12-55 NB (12 V 55 AH)

Restore dependable power to your Fortress Scientific 655FS 22NF mobility unit with this factory-fresh replacement battery. Engineered for compatibility with the Fortress Scientific 655FS 22NF model, this high-performance replacement battery offers deep-cycle reliability and consistent output to keep your wheelchair or scooter running smoothly. Installation uses your existing cables and hardware for a straightforward swap that returns long-lasting battery performance.

Key Specifications

  • Model Compatibility: Fortress Scientific 655FS 22NF
  • Required Quantity: 2 batteries per unit (the wheelchair requires 2 batteries)
  • Part/Type: SP12-55 NB (12 V 55 AH)
  • Voltage: 12 V
  • Capacity: 55 AH
  • Battery Technology: Absorbent Glass Mat (AGM) Technology
  • Intended Use: Designed For Deep Cycle Usage
  • Construction: Valve Regulated Spill Proof Construction
  • Performance Feature: Power/Volume Ratio Yielding Unrivaled Energy Density
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Terminal Type: Nut & Bolt
  • Brand/Seller: SigmasTek

Benefits

This Fortress Scientific replacement battery provides superior durability through sealed AGM construction, delivering corrosion-resistant, vibration-tolerant performance ideal for everyday mobility needs. As a high-performance battery engineered for deep-cycle use, it supports prolonged discharge periods and frequent recharge cycles—helping extend the operational time of your mobility device while minimizing downtime.

Long life is inherent in the design: the power/volume optimization offers high energy density so you get more runtime from a compact package. The valve-regulated, spill-proof format reduces maintenance and improves safety compared to wet-cell batteries. Certifications from U.L. and CE reflect adherence to established safety and manufacturing standards, and the unit ships factory-fresh with a 1 Year Warranty to protect your purchase.

Typical applications include Electric Wheelchairs, Power Chairs, Mobility Chairs, and Mobility Scooters. In addition to mobility uses, this long-lasting battery makes a solid choice for secondary roles like UPS backup, emergency power reserves, and compatible portable tool applications where a sealed, deep-cycle 12 V battery is appropriate.

Don’t wait—replace your Fortress Scientific 655FS 22NF batteries with this reliable SP12-55 NB (12 V 55 AH) option today. Buy now to secure a high-performance battery with fast shipping and the assurance of a 1 Year Warranty.

Technical Specifications

Voltage12 Volts
Amp Hours55 AH
Terminal TypeNut & Bolt
Length (in.)9.04
Width (in.)5.45
Height (in.)8.15
Weight (lb.)72.0

Product Highlights

  • Brand Replacement : Fortress Scientific 655FS
  • Manufacturer: SigmasTek
  • Product Type: Medical Equipment Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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