For questions, quotes, or help finding the right battery, feel free to email us at sales@batteryweb.com

New collections added! Learn more

🎉 First Order Special 🎉

First-time shoppers get 5% OFF on batteries & accessories!

WELCOME5
SigmasTek  |  SKU: BW-8805

CTM HS-2800 Compatible Replacement Battery

Sale price $107.13 USD Regular price $140.27
Shipping calculated at checkout.

➤ High-performance 12V 35AH battery designed for CTM HS-2800 wheelchair

➤ Maintenance-free and spill-proof AGM technology for safety and convenience

➤ Guaranteed compatibility with original NB terminal and dimensions

➤ Long service life with wide operating temperature range for reliable use

➤ Includes 1-year warranty and ships quickly via UPS Ground or USPS


📦🚀 FAST SHIPPING: Usually ships same day if ordered before 2 PM EST

⚠️ Quick Reminder

🔹 Please ensure the original battery model number is listed in our product description and that your device model number matches for compatibility.
🔹 We only supply the batteries shown in the images. Device images are provided for reference only.

📸 Send Your Battery Photo / Unsure? Expert 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 IMAGE

Battery Care Guide

Battery Usage and Maintenance Guidelines 🔋

Please read the following instructions carefully before using your new battery. Proper adherence will help ensure optimal performance and extended service life.

1. Cordless Phones, PDAs, and Power Tools (NiMH, NiCd, Lithium-Ion) 📱

Initial Charge

  • Fully charge the battery overnight prior to first use.

Conditioning (First 2–6 Charge Cycles)

  • Operate the device until the battery reaches approximately 20% capacity.
  • Avoid premature recharging.
  • Do not allow the battery to fully discharge during the initial cycles.

Post-Conditioning

  • Recharge the battery only when necessary.
  • These batteries are capable of approximately 500 charge cycles:
  • Once daily → ~500 days
    Twice daily → ~250 days
    Note: Even a partial recharge is considered a full cycle.

2. Sealed Lead Acid (SLA) Batteries 💡

  • No conditioning required.
  • Maintain the battery in a fully charged state; avoid complete discharge.
  • Capable of 300–400 charge cycles.
  • Expected service life: 2–3 years, depending on usage conditions.

3. Laptop Batteries (Lithium-Ion) 💻

Initial Charge

  • Fully charge the battery overnight prior to first use.

Conditioning (First 2–6 Charge Cycles)

  • Charge fully, then discharge to approximately 20% capacity.
  • Avoid complete discharge, as some devices may not detect a fully drained battery.

Post-Conditioning

  • Minimize frequent plugging and unplugging.
  • Allow the battery to discharge moderately at least once per month to maintain optimal performance.
  • Occasional cycling is recommended to sustain battery health.

Professional Recommendation

Adhering to these guidelines will enhance battery longevity and ensure reliable performance.

For further assistance regarding your battery or order, our customer support team is available to provide guidance.

Delivery and Shipping

Everything You Need to Know About Shipping with BatteryWeb (USA)

We know reliable delivery matters when you need power fast. Here’s how BatteryWeb makes shipping easy across the USA:

🚚 Shipping & Delivery

Most orders ship next business day (some products like sealed lead acid may take a little longer).

Same-day shipping available if you order before 11:59 AM (delivery depends on the carrier).

We ship nationwide using FedEx, UPS, USPS, DHL, and regional ground carriers.

Shipping costs are calculated automatically at checkout based on weight, distance, and carrier.

Transit times shown are estimates only (business days, no weekends/holidays).

🌍 Shipping Restrictions

Lithium batteries cannot be shipped by USPS or air. They must go via FedEx Ground, UPS Ground, or DHL Ground.

PO Box deliveries are only available via USPS.

At this time, we do not ship lithium batteries to Puerto Rico. NiMH, NiCd, and Alkaline can be shipped.

📦 Important Notes

Double-check your shipping address! If an incorrect address is used and the order is returned, re-shipping costs are the buyer’s responsibility.

If a product is temporarily out of stock, we’ll notify you right away with the expected restock date—or issue a refund if you prefer.

💲 Currency & Pricing

All prices are shown in USD.

Orders shipped outside the USA may be subject to local taxes, customs fees, or import duties. These are the buyer’s responsibility.

⚡ At BatteryWeb, we’re committed to getting your batteries delivered quickly, safely, and affordably—so you’ll always have the power you need, when you need it.

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.

🔹 Our products are generic replacement parts and are not affiliated with, endorsed by, or manufactured by the original equipment manufacturers (OEMs).


Volts & Amps

12 Volts | 35 AH

Terminal Type

Nut & Bolt

Replacement Battery for CTM HS-2800 - 12V 35AH (1-Pack)

Replace the single battery in your CTM HS-2800 with this compatible 12V 35AH replacement battery featuring an NB terminal. Engineered for high discharge performance and extended service life, this battery is a reliable choice for restoring full functionality to your mobility device. It meets or exceeds original equipment specifications for consistent, dependable operation.

Key Specifications

  • Package contains: 1 battery
  • Voltage: 12 Volts
  • Capacity: 35 AH (Amps)
  • Terminal type: NB (Nut & Bolt)
  • Weight: 24.7 Lbs
  • Length: 7.72 inches
  • Width: 5.14 inches
  • Height: 6.14 inches
  • Chemistry: SLA (Sealed Lead Acid)
  • Technology: AGM (Absorbent Glass Mat)
  • Maintenance-free and Spill Proof
  • Guaranteed compatibility with original battery
  • Warranty: 1-year Warranty
  • Shipping Methods: UPS Ground and USPS
  • We ship in 1 business day for all in-stock items
  • Shipping & Return Policies listed
  • Brand/Listing note: SigmasTek

Benefits

  • Robust AGM construction provides a sealed, spill-proof battery that’s maintenance-free and safe for use in mobility and medical equipment.
  • High-discharge design keeps voltage stable under load, delivering the power needed for motors, controls, and extended operation.
  • The compact, lighter weight design compared with two-battery setups makes replacement straightforward while still offering long-lasting battery life.
  • Wide operating temperature tolerance and durable construction help ensure consistent performance in everyday use and variable environments.
  • Ideal for mobility applications and also useful where reliable sealed lead-acid power is required: UPS systems, emergency power backups, and portable tools.
  • Guaranteed compatibility with your CTM HS-2800 wiring means easy installation using existing cables and original configuration.
  • Backed by a 1-year warranty and quick shipping to reduce downtime — a practical high-performance battery choice for urgent replacements.

Need a dependable replacement for your CTM HS-2800? Purchase this single 12V 35AH replacement battery now to restore reliable, long-lasting performance and get back to everyday independence.


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.