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SigmasTek  |  SKU: BW-9002

Quickie S11 High-Performance Wheelchair Replacement Battery

Sale price $313.99 USD Regular price $480.28
Shipping calculated at checkout.

➤ Factory fresh replacement batteries for Quickie S11 wheelchairs

➤ 100% compatible with Quickie S11 unit, requires 2 batteries (SP12-55 NB)

➤ AGM technology with deep cycle design for long-lasting performance

➤ Valve regulated, spill-proof, and certified for safety and reliability

➤ Includes 1-year warranty and guaranteed superior energy density


📦🚀 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.

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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 | 55 AH

Terminal Type

Nut & Bolt

Replacement Quickie S11 Battery — Compatible with Quickie S11

Upgrade your mobility with a reliable replacement battery built for the Quickie S11. These brand new Quickie S11 batteries deliver dependable performance and compatibility, engineered to restore range and responsiveness to your power chair. Designed for users who demand a high-performance battery that is also a long-lasting battery, this replacement is factory fresh and guaranteed to be 100% compatible with your Quickie S11 unit. Please note the Quickie S11 requires two SP12-55 NB (12 V 55 AH) batteries and you should reuse your existing cables and hardware to install the new units.

Key Specifications

  • Battery Model: SP12-55 NB
  • Voltage: 12 Volts
  • Capacity: 55 AH
  • Terminal Type: Nut & Bolt
  • Brand: SigmasTek
  • 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
  • Warranty: 1 Year Warranty
  • Performance: Performance Guaranteed
  • Compatibility Note: Quickie S11 requires 2 batteries

Benefits

  • Durability & Safety — Built with AGM technology and valve regulated, spill-proof construction, this replacement battery offers safe, maintenance-free operation and robust performance in daily use.
  • Long Life & Deep Cycle Performance — Specifically designed for deep cycle usage, the SP12-55 NB provides consistent power delivery over many discharge/recharge cycles, making it a true long-lasting battery for mobility needs.
  • High Energy Density & Compact Power — With a power/volume ratio that yields unrivaled energy density, these batteries maximize available capacity in the same physical footprint, delivering a high-performance battery experience for your Quickie S11.
  • Certified Reliability — U.L. Recognized and CE Certified for quality and safety, backed by a performance guarantee and a 1 year warranty to give you confidence in every purchase.
  • Typical Applications — Ideal for electric wheelchairs, power chairs, mobility chairs, and mobility scooters. These batteries also serve well in related scenarios that require reliable DC power such as UPS systems, emergency power backups, and portable power tools where deep-cycle capacity is needed.

Ready to restore full mobility? Buy your Quickie S11 replacement battery today and enjoy superior runtime, proven reliability, and excellent value. Orders for in-stock items typically ship within 24 hours — purchase now to get the dependable, high-performance battery your Quickie S11 deserves.


Payment & Security

Payment methods

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