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SigmasTek  |  SKU: BW-9848

Electric Mobility Butler Wheelchair High Performance Replacement Battery

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

➤ Factory fresh, brand new replacement batteries for reliable performance

➤ 100% compatible with Electric Mobility Butler wheelchair models

➤ Absorbent Glass Mat (AGM) technology for deep cycle usage and durability

➤ Valve regulated, spill-proof design ensures safety and maintenance-free use

➤ Includes 1-year warranty and certified quality (U.L. recognized, CE certified)


📦🚀 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 | 35 AH

Terminal Type

Nut & Bolt

Replacement Electric Mobility Butler Batteries — Compatible with Electric Mobility Butler (SP12-35 NB)

Keep your Electric Mobility Butler running smoothly with a factory-fresh replacement battery engineered for compatibility, performance, and peace of mind. This replacement battery is 100% compatible with the Electric Mobility Butler and built to provide dependable power where you need it most. Featuring AGM deep cycle technology, this high-performance battery and long-lasting battery solution is ideal for everyday mobility use. Important: the Electric Mobility Butler requires 2 batteries - SP12-35 NB (12 V 35 AH). Use all existing cables and hardware from your original setup to connect these replacement wheelchair batteries.

Key Specifications

  • Absorbent Glass Mat (AGM) Technology
  • Designed For Deep Cycle Usage
  • Valve Regulated Spill Proof Construction
  • Power/Volume Ratio Yielding Unrivaled Energy Density
  • U.L. Recognized and CE Certified
  • Performance Guaranteed
  • Brand New, Factory Fresh
  • 1 Year Warranty
  • Model: SP12-35 NB (12 V 35 AH)
  • Requires: 2 batteries for Electric Mobility Butler
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 35 AH
  • Terminal Type: Nut & Bolt

Benefits

  • Durable Construction: AGM and valve-regulated design deliver spill-proof, maintenance-free operation and robust performance in daily mobility use.
  • Extended Runtime: Engineered for deep cycle performance to provide longer usable life and consistent charge retention—this long-lasting battery is ideal for repetitive use.
  • Reliable Power: As a high-performance battery, it supplies steady voltage and energy density for electric wheelchairs, power chairs, mobility chairs, and mobility scooters.
  • Wide Use Cases: Although designed for the Electric Mobility Butler, the battery’s sealed lead acid chemistry makes it suitable for typical applications such as UPS systems, emergency power backup, and compatible portable tools when specifications align.
  • Certified Safety & Warranty: UL recognition, CE certification, and a 1 year warranty provide assurance that your replacement battery meets recognized safety standards and is backed by performance guarantees.
  • Simple Installation: Replace your original SP12-35 NB batteries using the existing cables and hardware for a quick, hassle-free upgrade to renewed mobility power.

Don’t wait—restore reliable operation to your Electric Mobility Butler with this SP12-35 NB replacement battery. Order now for a trusted replacement battery that offers excellent value, fast shipping on in-stock items, and the long-lasting performance you expect.


Payment & Security

Payment methods

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  • Discover
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  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

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