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SigmasTek  |  SKU: BW-9211

Merits MP3R High Performance Replacement Battery for Wheelchair

Sale price $156.99 USD Regular price $240.13
Shipping calculated at checkout.

➤ Factory fresh Merits MP3R wheelchair battery for reliable power

➤ 100% compatible with Merits MP3R units using SP12-55 NB (12V 55AH)

➤ AGM technology ensures deep cycle performance and durability

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

➤ Backed by a 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 | 55 AH

Terminal Type

Nut & Bolt

Merits MP3R Replacement Battery — SP12-55 NB

When your Merits MP3R needs a dependable power source, this brand-new replacement battery is built to deliver. This SP12-55 NB unit provides 12 Volts and 55 AH in an AGM, valve-regulated package, offering the deep-cycle capacity and spill-proof safety necessary for everyday mobility use. Choose a high-performance battery that brings back reliable runtime and peace of mind.

Key Specifications

  • Compatible Model: Merits MP3R
  • Part Number: SP12-55 NB
  • Voltage: 12 Volts
  • Capacity: 55 AH
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Usage Type: Designed For Deep Cycle Usage
  • Construction: Valve Regulated Spill Proof Construction
  • Energy Density: 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
  • Terminal Type: Nut & Bolt

Benefits

  • Durability: Robust AGM construction and a valve-regulated design create a maintenance-free, resilient battery built to withstand the rigors of mobility use.
  • Long Life: Optimized for deep-cycle applications to provide extended operational life and consistent capacity retention over many charge cycles.
  • High Performance: The superior power-to-volume ratio gives you efficient energy delivery and dependable performance during daily operation.
  • Safety & Compliance: U.L. recognition and CE certification ensure the product meets important safety and manufacturing quality standards.
  • Application Flexibility: Ideal for electric wheelchairs, power chairs, mobility chairs, mobility scooters, as well as UPS backup systems, emergency power applications, and compatible tool systems.
  • Easy Replacement: Fully compatible with the Merits MP3R — install using your existing cables and hardware for a fast, correct connection.
  • Assured Value: Arrives brand-new and factory-fresh with a 1 year warranty to protect your investment and provide reliable service.

Get your replacement Merits MP3R battery today and experience the benefits of a high-performance, long-lasting battery that restores mobility and reliability. Order now to secure fast shipping on in-stock items and get back to dependable power.


Payment & Security

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