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SigmasTek  |  SKU: BW-4321

Eaton Powerware BAT-0121 UPS Compatible Replacement Battery

Sale price $141.79 USD Regular price $179.07
Shipping calculated at checkout.

➤ Absorbent Glass Mat (AGM) technology for enhanced battery life

➤ High rate discharge design supports heavy power demands

➤ Maintenance-free and spill-proof construction for safety and convenience

➤ U.L. recognized and CE certified for quality assurance

➤ Brand new, factory fresh with 1 year warranty included


📦🚀 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

Eaton Powerware BAT-0121 - Replacement Eaton Powerware BAT-0121 UPS Battery

This replacement Eaton Powerware BAT-0121 battery is engineered for direct compatibility with the Eaton Powerware BAT-0121 UPS model, delivering dependable performance and reliability for critical backup applications. Built to meet or exceed the OEM SLA specifications, this replacement UPS battery offers the consistent power, safe construction, and maintenance-free operation required by modern UPS systems. Whether you need emergency power, backup for sensitive electronics, or a replacement for aging battery packs, this high-performance UPS battery is designed to restore runtime and protect your equipment.

Key Specifications

  • Compatibility: Eaton Powerware BAT-0121
  • Battery Type: Absorbent Glass Mat (AGM) Technology
  • Design: High Rate Discharge Design
  • Construction: Maintenance-Free, Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 55 AH
  • Terminal Type: Nut & Bolt

Benefits

  • Durability: Constructed with AGM technology and spill-proof design to withstand daily UPS cycling and resist leakage for safe, long-term use.
  • Long Life: Low self-discharge and factory-fresh cells provide extended shelf life and dependable service life in standby and cyclic applications, making this a long-lasting battery solution for your UPS.
  • High Performance: The high rate discharge design delivers the instantaneous current required during power interruptions, making it a high-performance UPS battery ideal for short-duration, high-power demands.
  • Safe and Certified: U.L. recognized and CE certified for compliance and safe operation in regulated environments.
  • Typical Applications: Ideal for Uninterruptible Power Supply (UPS) units, emergency power systems, and battery-powered tools where consistent, reliable power is required.
  • Maintenance-Free Convenience: The sealed, maintenance-free construction eliminates the need for periodic watering or complex upkeep, perfect for busy IT rooms and remote installations.

Restore reliable backup power with this replacement UPS battery for the Eaton Powerware BAT-0121. Order now to upgrade to a high-performance UPS battery and ensure your UPS provides the dependable emergency power you count on. Purchase today and get fast fulfillment backed by a 1 Year Warranty.



Payment & Security

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