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-9921

CTM HS-665 Wheelchair High Performance Replacement Battery 49.45 lb

17% off
New arrival
Sale price $245.99 USD Regular price $297.99
Shipping calculated at checkout.
Factory fresh, brand new replacement batteries for reliable performance
100% compatible with CTM HS-665 wheelchair models
Advanced AGM technology for deep cycle use and spill-proof safety
High energy density ensures longer run time and efficient power output
Backed by 1-year warranty and certified for quality and safety compliance
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 | 35 AH

Terminal Type

Nut & Bolt

Replacement SP12-35 NB (12V 35AH) Batteries for CTM HS-665 Wheelchair

Restore mobility and confidence with brand new replacement batteries SP12-35 NB (12 V 35 AH) for your CTM HS-665 wheelchair. These factory-fresh, deep-cycle batteries are engineered for full compatibility with the CTM HS-665 and deliver the reliable, long-lasting battery performance needed for daily travel and extended outings. Trust a high-performance battery pair to keep your mobility device running smoothly.

Key Specifications

  • Model: SP12-35 NB (12 V 35 AH)
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Usage: Designed For Deep Cycle Usage
  • Construction: Valve Regulated Spill Proof Construction
  • Energy Density: Power/Volume Ratio Yielding Unrivaled Energy Density
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Performance: Performance Guaranteed
  • Warranty: 1 Year Warranty
  • Applications listed: Electric Wheelchairs, Power Chairs, Mobility Chairs, Mobility Scooters
  • Pack requirement: CTM HS-665 requires 2 batteries
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 35 AH
  • Terminal: Nut & Bolt

Benefits

These replacement batteries are designed for the specific demands of mobility devices. The deep cycle construction and AGM chemistry provide a long-lasting battery life with dependable recharge acceptance and excellent cycle durability. As a high-performance battery option, they deliver steady voltage under load and maximize usable capacity—translating to longer trips and fewer mid-day recharges.

Valve-regulated, spill-proof construction reduces maintenance and improves safety, while the high power-to-volume ratio means more energy in a compact package. U.L. recognition and CE certification confirm manufacturing quality and compliance with safety standards. The brand-new, factory-fresh condition and one year warranty give you confidence that you’re investing in a reliable component for daily use.

Typical applications include electric wheelchairs, power chairs, mobility chairs, and mobility scooters—anywhere dependable, long-lasting battery power is essential. Because the CTM HS-665 requires two batteries, this matched set ensures balanced performance and predictable runtime when installed using your existing cables and hardware.

Replace your CTM HS-665 batteries today with this reliable, long-lasting replacement battery pair and experience improved mobility performance. Order now to secure fast shipping and a 1 year warranty for worry-free operation.

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 : CTM HS-665 Wheelchair
  • Manufacturer: SigmasTek
  • Product Type: Medical Equipment Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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.