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SigmasTek  |  SKU: BW-2721

Liebert GXT-3000RT-120B High Performance UPS Replacement Battery Set

Sale price $131.99 USD Regular price $193.14
Shipping calculated at checkout.

➤ Includes 8 brand new SigmasTek SP12-7.5HR batteries for Liebert GXT-3000RT-120B UPS

➤ High rate discharge design for superior short-term power output

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

➤ Low self-discharge and high vibration resistance for longer battery life

➤ U.L. recognized and CE certified with a 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 | 7.5 Ah

Terminal Type

F2

Replacement Battery Set for Liebert GXT-3000RT-120B

Replace the depleted cells in your Liebert GXT-3000RT-120B with a dependable, high-performance replacement UPS battery set engineered for compatibility, consistent runtime, and dependable reliability. This kit includes eight SigmasTek SP12-7.5HR batteries designed specifically for high rate discharge UPS applications where short bursts of higher power are required. Whether you maintain data center UPS racks or emergency backup systems, these brand new, factory fresh batteries deliver the performance you need to keep critical equipment running. If you’re searching for a replacement UPS battery that balances cost, quality, and safety for the Liebert GXT-3000RT-120B, this set is an excellent choice.

Key Specifications

  • Battery Model: SigmasTek SP12-7.5HR
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 7.5 Ah (Ampere-hours)
  • Quantity: 8 batteries (complete replacement set)
  • Terminal Type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated, Spill Proof
  • Features: Low Self-discharge; High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year
  • Compatible With: Liebert GXT-3000RT-120B UPS unit
  • Applications: Uninterruptible Power Supply (UPS) Units, Emergency Power Supply, Battery Powered Tools

Benefits

This replacement UPS battery set provides long-lasting battery performance and rugged durability for demanding environments. The high rate discharge design ensures the Liebert GXT-3000RT-120B can supply higher power output during short, critical events without compromising stability. Valve regulated, spill proof construction and low self-discharge characteristics mean reduced maintenance and safer handling in tight UPS racks. Certified to U.L. and CE standards, these batteries meet safety expectations for commercial and industrial use.

Expect a high-performance UPS battery experience: superior vibration resistance increases longevity in systems exposed to movement or vibration, while factory fresh units guarantee consistent capacity and predictable runtime. Typical applications include keeping servers and network equipment online in UPS systems, providing emergency power in critical facilities, and supporting battery powered tools during maintenance or emergency operations. Technically tested to meet or exceed OEM specifications, this set is a reliable replacement UPS battery solution for the Liebert GXT-3000RT-120B.

Ready to upgrade? Buy your replacement batteries for the Liebert GXT-3000RT-120B now — orders for in-stock items typically ship within 24 hours. Choose a long-lasting battery and restore dependable backup power today.


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