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SigmasTek  |  SKU: BW-9524

Merits Pioneer 3 S1312 High Performance Wheelchair Replacement Battery

Sale price $183.99 USD Regular price $280.53
Shipping calculated at checkout.

➤ Factory fresh, high-quality replacement batteries for Merits Pioneer 3 S1312

➤ 100% compatible with your Merits Pioneer 3 S1312 wheelchair unit

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

➤ Valve regulated, spill-proof design for safe and reliable use

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


📦🚀 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 Merits Pioneer 3 S1312 Batteries — SP12-35 NB (12V 35AH) — SigmasTek

When your Merits Pioneer 3 S1312 mobility unit needs fresh power, choose these factory-fresh replacement Merits Pioneer 3 S1312 batteries (SP12-35 NB) rated at 12V 35AH. Designed for deep-cycle use and built with AGM technology, these high-performance batteries deliver consistent energy density and dependable service to keep your wheelchair or mobility device running with confidence. If your unit requires two batteries, these replacements are specified to restore full performance and reliability.

Key Specifications

  • Battery Model: SP12-35 NB
  • Voltage: 12 Volts
  • Capacity: 35 AH
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Usage: Designed for Deep Cycle Usage
  • Construction: Valve Regulated Spill Proof Construction
  • Performance: Power/Volume Ratio Yielding Unrivaled Energy Density
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek (as indicated)
  • Terminal/Connection: Nut & Bolt
  • Compatibility: Merits Pioneer 3 S1312 (requires 2 batteries)

Benefits

These replacement batteries deliver a long-lasting battery solution through AGM construction that is valve-regulated and spill-proof, minimizing maintenance and enhancing safety for mobility applications. The deep-cycle design supports repeated discharge and recharge cycles typical of powered wheelchairs and scooters, making these units a reliable, long-term power source for daily mobility needs.

As a high-performance battery option, the SP12-35 NB offers an excellent power-to-volume ratio, providing extended runtime without excessive bulk. Certified by U.L. and CE and shipped factory-fresh, these batteries meet industry standards for quality and safety. The included nut & bolt connections match common OEM hardware, and the listing notes that you should reuse your existing cables and hardware for proper installation.

Typical applications include electric wheelchairs, power chairs, mobility chairs, and mobility scooters—anywhere sustained deep-cycle performance is required. The robust construction and energy density make these batteries suitable for daily use, extended outings, and environments where dependable mobility is essential.

With a 1 year warranty and performance guarantees, these replacement batteries offer confidence and value for maintaining your Merits Pioneer 3 S1312. If you need help choosing the right battery or confirming fitment, customer service is available to assist.

Restore mobility and confidence—purchase these replacement Merits Pioneer 3 S1312 (SP12-35 NB) 12V 35AH batteries today and get superior, long-lasting battery performance for your wheelchair.


Payment & Security

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