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-8651

Optiway Technology 2000FS U1 High Performance Replacement Battery Set

Sale price $214.25 USD Regular price $280.53
Shipping calculated at checkout.

➤ Includes 2 high-performance 12V 35AH batteries with NB terminals

➤ Maintenance-free, spill-proof design with SLA and AGM technology

➤ Guaranteed compatibility with original Optiway Technology 2000FS U1 batteries

➤ Wide operating temperature range for reliable wheelchair power

➤ Backed by a 1-year warranty for quality and durability assurance


📦🚀 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

Optiway Technology 2000FS U1 Replacement Battery — Compatible with 2000FS U1

Ensure your Optiway Technology 2000FS U1 remains fully operational with this reliable pair of replacement batteries designed for compatibility, performance, and endurance. These two 12V 35AH batteries provide a robust, high-performance battery solution tailored to the 2000FS U1’s needs. For users who depend on consistent mobility, this long-lasting battery set helps maintain independence and dependable operation.

Key Specifications

  • Package contains 2 batteries
  • Maintenance-free
  • Spill Proof
  • SLA Chemistry
  • AGM Technology
  • Guaranteed compatibility with original batteries
  • 1-year Warranty
  • Volts: 12
  • Amps: 35
  • Weight: 49.4Lbs
  • Length: 7.72
  • Width: 5.14
  • Height: 6.14
  • Terminal: NB (Nut & Bolt)
  • Brand: SigmasTek
  • Shipping Methods: UPS Ground and USPS
  • We ship in 1 business day for all in-stock items

Benefits

Built with sealed AGM plates and SLA chemistry, the Optiway 2000FS U1 replacement batteries are maintenance-free and spill-proof, offering a safe and clean power solution. As a high-performance battery option, these units support high discharge rates necessary for mobility functions like acceleration, incline handling, and extended run times. The robust design also offers a wide operating temperature range and a long expected service life.

Durability and reduced maintenance are key advantages — the sealed design prevents leakage and minimizes upkeep compared to traditional flooded batteries. Guaranteed compatibility with the original 2000FS U1 batteries makes replacement straightforward: install in the original configuration and reuse your existing cables. Be sure to check the current battery dimensions before ordering to confirm fitment.

Common uses for this long-lasting battery set include powering Optiway wheelchairs such as the 2000FS U1, providing UPS backup for electronics, emergency power sources, mobility devices, and compatible power tools. This replacement battery pair offers consistent, dependable energy for essential applications.

Ready to buy? Add this set of two 12V 35AH replacement batteries for your Optiway Technology 2000FS U1 to your cart now for fast shipping and a 1-year warranty on performance and quality.


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.