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SigmasTek  |  SKU: BW-5426

APC SMART-UPS SU1000X127 UPS High Performance Replacement Battery Set

Sale price $51.94 USD Regular price $75.31
Shipping calculated at checkout.

➤ Durable 12V, 12 Ah battery for CURK6 applications

➤ Compatible with APC CURK6 UPS models

➤ Delivers steady, reliable backup power

➤ Safeguards devices against power interruptions

➤ Compact size for convenient placement


📦🚀 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 | 12 Ah

Terminal Type

F2

SigmasTek12 Volts12 Ah F2 — Compatible with APC SMART-UPS

Designed for reliable power and simple swap-out maintenance, the SigmasTek12 Volts12 Ah F2 is an ideal replacement UPS battery for APC SMART-UPS systems. This high-performance UPS battery provides stable 12 Volt power delivery and a dependable 12 Ah capacity to keep your critical equipment running through outages and brownouts. Whether you are servicing data center racks, small office equipment, or a home lab, this battery delivers the consistent performance and reliability you expect from a quality replacement UPS battery.

Key Specifications

  • Brand: SigmasTek12
  • Voltage: 12 Volts
  • Capacity: 12 Ah
  • Terminal Type: F2
  • Compatible UPS Model: APC SMART-UPS

Benefits

Built to meet the demands of mission-critical systems, this SigmasTek12 12 Volts 12 Ah battery is engineered for durability and long life. As a long-lasting battery option, it offers excellent charge acceptance and reliable discharge characteristics that help ensure predictable runtime for your APC SMART-UPS. The F2 terminal design allows for an easy, secure connection during replacement, minimizing downtime and simplifying maintenance.

This high-performance UPS battery supports a range of applications: use it in UPS backup for servers and networking gear, emergency power for telecommunications and security systems, or as a replacement cell for power tool charging stations and industrial control cabinets where stable 12V DC is required. Its consistent output and robust build make it a trustworthy replacement UPS battery for environments that demand steady, uninterrupted power.

Maintenance teams and IT managers will appreciate the predictable behavior and consistent capacity of this SigmasTek12 unit. With clear compatibility for APC SMART-UPS models, you can confidently replace aging batteries to restore full runtime and avoid unexpected service interruptions. It’s an affordable, effective way to extend the life of your existing UPS without costly equipment swaps.

Ready to restore dependable backup power? Order this SigmasTek12 12 Volts 12 Ah F2 replacement UPS battery for your APC SMART-UPS today and ensure your systems stay protected when it matters most.


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