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SigmasTek  |  SKU: BW-4356

APC SRT3000RMXLT-5KTF UPS High Performance Replacement Battery Set

Sale price $92.99 USD Regular price $135.15
Shipping calculated at checkout.

➤ Set of 8 SigmasTek SP12-5.5HR batteries (12V 5.5AH) designed for APC SRT3000RMXLT-5KTF

➤ High vibration resistance for durability in demanding environments

➤ Certified U.L. recognized and CE compliant for safety assurance

➤ Tested to meet or exceed OEM specifications for reliable performance

➤ Requires use of existing cables and hardware for installation


📦🚀 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 | 5.5 Ah

Terminal Type

F2

SigmasTek Replacement Battery Set for APC SRT3000RMXLT-5KTF

Upgrade and restore your APC SRT3000RMXLT-5KTF with this complete SigmasTek replacement battery set designed for dependable compatibility, exceptional performance, and reliable backup power. This replacement UPS battery kit is engineered to deliver the short-term, high-current output required by high-rate discharge UPS systems, bringing your APC SRT3000RMXLT-5KTF back to peak operation. Whether you are maintaining a data center rack, protecting critical equipment, or preparing for emergency power events, this long-lasting battery solution is built to perform when you need it most.

Key Specifications

  • Quantity: 8 batteries per set
  • Battery Model: SigmasTek SP12-5.5HR
  • Voltage: 12 Volts
  • Capacity: 5.5 AH
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Self-discharge: Low Self-discharge
  • Durability: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatibility: Replacement batteries for APC SRT3000RMXLT-5KTF UPS unit
  • Applications: Uninterruptible Power Supply (UPS) Units, Emergency Power Supply, Battery Powered Tools
  • Installation Note: Use existing cables and hardware from your original configuration to connect the new UPS batteries

Benefits

This SigmasTek set is a high-performance UPS battery option for APC SRT3000RMXLT-5KTF owners who expect dependable output and rugged construction. The high rate discharge design provides rapid power delivery for short, critical periods — ideal for systems that demand immediate, strong current during a transfer or shutdown sequence. The valve regulated spill-proof construction and low self-discharge features mean the batteries are safer to handle, store, and deploy while retaining charge longer between maintenance intervals.

Durability is built into every cell: high vibration resistance and recognized certifications (U.L. and CE) ensure consistent, reliable operation in demanding environments. These features combine to create a long-lasting battery solution that reduces the frequency of replacements and helps maintain continuous protection for sensitive electronics.

Typical applications include replacing worn packs in UPS units like the APC SRT3000RMXLT-5KTF, serving as emergency power supply banks, or powering battery-operated tools that require dependable short-term outputs. Technically tested to meet or exceed OEM specifications, this replacement UPS battery set is ideal for IT racks, server rooms, telecommunications closets, and emergency backup systems.

Ready to replace the worn batteries in your APC SRT3000RMXLT-5KTF? Order this high-performance UPS battery set now to ensure fast shipping and reliable protection — buy with confidence and restore dependable backup power today.


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