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SigmasTek  |  SKU: BW-4362

APC SRT1500RMXLA UPS High Performance Replacement Battery Set

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

➤ Includes 8 brand new SigmasTek SP12-5.5HR batteries (12V 5.5AH)

➤ High rate discharge design ideal for UPS and emergency power

➤ Valve regulated and spill-proof for leak-free performance

➤ Low self-discharge maintains battery health over time

➤ UL recognized and CE certified for dependable 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 | 5.5 Ah

Terminal Type

F2

Replacement Battery Set for APC SRT1500RMXLA UPS (8 x SigmasTek SP12-5.5HR)

Bring your APC SRT1500RMXLA UPS back to reliable operation with this fully compatible replacement UPS battery set. Featuring eight SigmasTek SP12-5.5HR batteries, this kit is engineered for high-rate discharge performance and dependable service in essential backup applications. Expect consistent output, low self-discharge, and rugged construction—perfect for protecting servers, network equipment, and other critical loads against power interruptions.

Key Specifications

  • Battery Brand: SigmasTek
  • Battery Model: SP12-5.5HR
  • Quantity: 8 batteries (replacement set)
  • Voltage: 12 Volts
  • Capacity: 5.5 AH (Amp-hours)
  • Terminal Type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Features: Low Self-discharge, High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty

Benefits

This high-performance UPS battery kit combines rugged reliability with extended service life to deliver real value. The high-rate discharge capability is ideal for UPS systems that need short bursts of increased power, while valve-regulated, spill-proof construction reduces maintenance and enhances safety. Low self-discharge means the batteries hold charge longer in storage, and high vibration resistance helps ensure stable operation in rack-mounted or mobile installations.

Perfect as a replacement UPS battery, this set supports a wide range of applications, including uninterruptible power supply units, emergency power systems, and battery-powered tools that demand reliable, high-output performance. Each battery is factory fresh and tested to meet or exceed typical OEM specifications, providing a dependable alternative to original equipment. Note that installation requires reuse of the original cables and hardware from your APC SRT1500RMXLA.

If you're looking for a long-lasting battery solution that maintains peak UPS performance, this SigmasTek set is an excellent choice. We ship in-stock orders promptly, usually within 24 hours, so you can restore protection quickly.

Take action now—purchase this replacement UPS battery set for the APC SRT1500RMXLA and ensure uninterrupted power and peace of mind for your critical equipment.


Payment & Security

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