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SigmasTek  |  SKU: BW-8539

Merits Pioneer 1 S142 High Performance Compatible Replacement Battery Set

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

➤ Includes 2 high-performance 12V 35AH replacement batteries

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

➤ Guaranteed compatibility with original Merits Pioneer 1 S142 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.

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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

Merits Pioneer 1 S142 Replacement Battery - Compatible with Merits Pioneer 1 S142

Ensure consistent performance for your Merits Pioneer 1 S142 with this certified replacement battery set. This package contains two 12V 35AH sealed batteries that deliver the high-discharge performance and dependable service life you expect from a quality replacement battery. Designed to meet or exceed the original specifications, these batteries are an excellent choice for restoring your wheelchair’s runtime and dependability.

Key Specifications

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

Benefits

  • Durability: The sealed AGM design prevents leaks and minimizes maintenance, providing a robust, safe power source for mobility equipment.
  • Long Life: Engineered for a high-discharge profile and a broad operating temperature range, these batteries offer a long expected service life—making them a true long-lasting battery option.
  • High Performance: Reliable voltage under load and optimized discharge characteristics ensure smooth operation of your Merits Pioneer 1 S142, even under daily use.
  • User-Friendly Installation: These batteries are intended to be installed in the same orientation as your originals and to use your existing cables. NB terminals (Nut & Bolt) match factory fittings for straightforward installation.
  • Versatile Applications: While optimized for the Merits Pioneer 1 S142 wheelchair, these batteries are also suitable for UPS systems, emergency backup power, and equipment that requires sealed 12V 35AH SLA/AGM batteries.
  • Assured Quality: Built to meet OEM standards and supported by a 1-year warranty and prompt shipping to reduce downtime for essential mobility needs.

Ready to replace the batteries in your Merits Pioneer 1 S142? Add this set of two high-performance replacement batteries to your cart now and enjoy fast shipping and the reassurance of a 1-year warranty.


Payment & Security

Payment methods

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