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SigmasTek  |  SKU: BW-8756

Merits Pioneer 3 S131 Deluxe 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 AGM technology

➤ Guaranteed compatibility with original Merits Pioneer 3 S131 Deluxe U1 batteries

➤ Wide operating temperature range and long service life for reliable power

➤ Backed by a 1-year warranty for quality assurance and peace of mind


📦🚀 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 Battery for Merits Pioneer 3 S131 Deluxe U1 Wheelchair

Renew the power in your Merits Pioneer 3 S131 Deluxe U1 wheelchair with this matched pair of replacement batteries. These two 12V 35AH batteries feature NB (Nut & Bolt) terminals and AGM sealed SLA construction for a maintenance-free, spill-proof power source. Engineered for reliability and high performance, this long-lasting battery kit is designed to meet or exceed the original equipment specifications so you can rely on consistent operation every day.

Key Specifications

  • Package contains: 2 batteries
  • Voltage: 12 Volts
  • Capacity: 35 AH (Amp-hours)
  • Terminal: NB (Nut & Bolt)
  • Chemistry: SLA (Sealed Lead Acid)
  • Technology: AGM (Absorbent Glass Mat)
  • Weight: 49.4 Lbs (as listed)
  • Dimensions (per battery): Length 7.72 in, Width 5.14 in, Height 6.14 in
  • Maintenance-free and spill proof
  • Guaranteed compatibility with original batteries
  • Warranty: 1-year Warranty
  • Brand indication: SigmasTek (as listed)
  • Shipping Methods: UPS Ground and USPS
  • Shipping speed: We ship in 1 business day for all in-stock items
  • Terminal hardware style: Nut & Bolt

Benefits

  • Durability: AGM and sealed SLA design provide rugged, maintenance-free service that stands up to frequent use in mobility applications.
  • Long life: The high discharge design and broad operating temperature tolerance contribute to a long-lasting battery life, minimizing replacement frequency.
  • High performance: These batteries are built to perform like or better than the originals, delivering stable power and reliable performance for your wheelchair.
  • Typical applications: Perfectly matched for the Merits Pioneer 3 S131 Deluxe U1; also suitable for similar mobility devices and can serve as backup for small UPS systems, emergency power supplies, and compatible tools.
  • Easy swap-in: Install in the same original configuration and reuse your existing cables; NB terminals (Nut & Bolt) give a solid electrical connection.
  • Assurance: Backed by a 1-year warranty and fast shipping, so you get a dependable replacement battery when you need it most.

Confirm your current battery dimensions before ordering and if you only need a single replacement battery, please visit Wheelchair Batteries by V and AH to purchase one unit. Ready to secure a trusted, high-performance replacement battery for your Merits Pioneer 3 S131 Deluxe U1? Click to buy this pair now and restore dependable, long-lasting power.


Payment & Security

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