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SigmasTek  |  SKU: BW-4372

APC SURT20KRMXLT UPS High Performance Replacement Battery Set

Sale price $738.99 USD Regular price $1,081.11
Shipping calculated at checkout.

➤ Includes 64 SigmasTek SP12-5.5HR batteries (12V 5.5AH) for APC SURT20KRMXLT UPS units

➤ High rate discharge for reliable UPS power backup

➤ Valve regulated and spill-proof design for safety

➤ Low self-discharge technology preserves charge

➤ Factory fresh and certified with 1 year warranty


📦🚀 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 SURT20KRMXLT

Restore full backup power to your APC SURT20KRMXLT with this professional replacement UPS battery set. Designed for dependable compatibility and performance, these SigmasTek batteries deliver the stability and power needed for critical systems. Install with confidence when you need a high-performance UPS battery replacement that meets rigorous safety and performance expectations.

Key Specifications

  • Compatible UPS model: APC SURT20KRMXLT
  • Quantity: 64 batteries per set
  • Battery brand: SigmasTek
  • Battery model: SP12-5.5HR
  • Voltage: 12 Volts
  • Capacity: 5.5 AH
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Feature: Low Self-discharge
  • Feature: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Installation note: Use all existing cables and hardware from original configuration

Benefits

This replacement UPS battery kit is engineered to provide a long-lasting battery option for your APC SURT20KRMXLT, delivering superior run-time stability and resilience under load. The high rate discharge design ensures the pack can supply elevated power when needed, making it an excellent high-performance UPS battery for surge events, load shedding and short-duration high-demand recovery scenarios.

Durability is built into every cell: valve-regulated, spill-proof construction minimizes maintenance and improves safety, while low self-discharge preserves stored energy during service intervals. High vibration resistance keeps the batteries performing reliably in rack-mounted deployments and environments subject to mechanical stress. Because each battery is brand new and factory fresh, you benefit from consistent capacity and predictable runtime across the entire bank.

Typical applications include uninterruptible power supply (UPS) systems, emergency power supply setups, and battery powered tools integrated into backup workflows. Our experienced team tests each battery set to ensure it meets or exceeds OEM expectations for performance and safety, and the UL/CE recognitions provide added compliance assurance.

Ready to replace your APC SURT20KRMXLT batteries? Purchase this high-performance, long-lasting replacement UPS battery set today and restore trusted backup power to your equipment.


Payment & Security

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