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SigmasTek  |  SKU: BW-10259

CTM HS-666 High Performance Compatible Wheelchair Replacement Battery 24.72 lb

23% off
New arrival
Sale price $122.99 USD Regular price $159.99
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Factory fresh replacement battery for CTM HS-666 wheelchair
Uses Absorbent Glass Mat (AGM) technology for durability
Valve regulated and spill-proof for safe, maintenance-free use
Deep cycle design ensures long-lasting power and performance
1-year warranty with U.L. recognized and CE certified 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

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


Volts & Amps

12 Volts | 35 AH

Terminal Type

Nut & Bolt

SigmasTek Replacement CTM HS-666 Battery — Compatible with CTM HS-666 (SP12-35 NB)

This factory-fresh SigmasTek replacement battery is made to be 100% compatible with the CTM HS-666 wheelchair. Specified as SP12-35 NB (12 V 35 AH), this replacement battery combines AGM deep-cycle technology with valve-regulated, spill-proof construction to deliver consistent performance and dependable runtime. If you need a high-performance battery for your CTM HS-666, this product gives you a long-lasting battery option backed by a one-year warranty.

Key Specifications

  • Brand: SigmasTek
  • Model / Compatible: CTM HS-666 (SP12-35 NB)
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Designed For: Deep Cycle Usage
  • Construction: Valve Regulated Spill Proof Construction
  • Performance: Power/Volume Ratio Yielding Unrivaled Energy Density
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Voltage: 12 Volts
  • Capacity: 35 AH
  • Terminal: Nut & Bolt
  • Warranty: 1 Year Warranty
  • Performance Guarantee: Performance Guaranteed

Benefits

  • Durability: Robust AGM and valve-regulated construction stand up to daily use and the stresses of mobility transport.
  • Long life: Optimized for deep-cycle duty so you get sustained run times and longer service life — a true long-lasting battery for mobility devices.
  • High performance: Efficient energy density and reliable discharge characteristics make this a high-performance battery for powering wheelchairs and scooters.
  • Maintenance-free: Sealed, spill-proof design removes the need for watering or electrolyte checks and ensures safe, easy ownership.
  • Typical applications: Designed for electric wheelchairs, power chairs, mobility chairs, and mobility scooters using SP12-35 NB configuration.
  • Installation guidance: Use your existing cables and hardware from the original configuration to connect this replacement battery — straightforward swap without modifications.
  • Certified and supported: U.L. recognition, CE certification, and a 1 year warranty provide reliability and support for everyday mobility needs.

Don’t wait to restore reliable power to your CTM HS-666. Order this SigmasTek replacement battery now to get a dependable, long-lasting battery with fast shipping and a one-year warranty.

Technical Specifications

Voltage12 Volts
Amp Hours35 AH
Terminal TypeNut & Bolt
Length (in.)7.72
Width (in.)5.14
Height (in.)6.22
Weight (lb.)24.7

Product Highlights

  • Brand Replacement : CTM HS-666 Wheelchair
  • Manufacturer: SigmasTek
  • Product Type: Medical Equipment Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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