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SigmasTek  |  SKU: BW-9260

Merits Pioneer 4 S141 Deluxe High Performance Wheelchair Replacement Battery

Sale price $227.99 USD Regular price $348.84
Shipping calculated at checkout.

➤ Factory fresh Merits Pioneer 4 S141 Deluxe replacement batteries

➤ 100% compatible with Merits Pioneer 4 S141 Deluxe wheelchair units

➤ Absorbent Glass Mat (AGM) technology for deep cycle use

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

➤ Includes 1-year warranty with guaranteed performance


📦🚀 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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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.
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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 | 40 Ah

Terminal Type

Nut & Bolt

Merits Pioneer 4 S141 Deluxe Replacement Battery - Compatible with Merits Pioneer 4 S141 Deluxe

Restore dependable performance to your Merits Pioneer 4 S141 Deluxe with a premium replacement battery built for reliable, deep cycle power. These brand new replacement batteries are specifically compatible with the Merits Pioneer 4 S141 Deluxe and provide a safe, maintenance-free solution to keep your mobility device operating with confidence.

Key Specifications

  • Model Compatibility: Merits Pioneer 4 S141 Deluxe
  • Required Quantity: 2 batteries (SP12-40 NB)
  • Voltage: 12 Volts
  • Amp-Hours: 40 Ah
  • Terminal Type: Nut & Bolt
  • Battery Technology: Absorbent Glass Mat (AGM)
  • Designed For: Deep cycle usage
  • Construction: Valve regulated, spill proof
  • Energy Density: High power/volume ratio
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand new, factory fresh
  • Performance: Performance guaranteed
  • Brand: SigmasTek
  • Warranty: 1 Year Warranty

Benefits

This replacement battery delivers rugged durability and consistent charge retention thanks to AGM technology and valve-regulated, spill-proof construction. Built for deep cycle demands, it provides the steady current and long runtime needed for daily mobility tasks. As a high-performance battery, it offers reliable starts and steady performance under frequent charge/discharge cycles, making it ideal for users who depend on their mobility device every day.

The compact, high energy density design yields more usable power without adding bulk, contributing to a long-lasting battery experience that reduces downtime and maintenance. Use these batteries in electric wheelchairs, power chairs, mobility chairs, and mobility scooters with confidence. Their stability and reliability also make them well suited for UPS units, emergency backup power, and specific portable tool applications requiring deep cycle performance.

Certified by UL and CE and backed by a one-year warranty, these SigmasTek SP12-40 NB (12 V 40 AH) batteries are brand new and performance guaranteed. They are a direct replacement for Merits Pioneer 4 S141 Deluxe units—simply reuse your existing cables and hardware to install.

Take the next step toward reliable mobility—buy this long-lasting, high-performance replacement battery for your Merits Pioneer 4 S141 Deluxe today and enjoy consistent power and peace of mind.


Payment & Security

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