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SigmasTek  |  SKU: BW-1885

SigmasTek SPX12-540FR High Performance UPS Replacement Battery

Sale price $478.99 USD Regular price $684.71
Shipping calculated at checkout.

➤ Genuine SigmasTek SPX12-540FR rechargeable UPS battery

➤ High-rate discharge delivers dependable UPS performance

➤ Less than 3% self-discharge rate for long shelf life

➤ No-leak, spill-proof design usable in any position

➤ UL Listed ABS flame retardant case with 3-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 | 159 Ah

Terminal Type

Internal Thread

Genuine SigmasTek SPX12-540FR — Compatible with SPX12-540FR

The genuine SigmasTek SPX12-540FR is a sealed lead acid battery built for dependable UPS performance and standby power reliability. This high-rate design offers consistent discharge capability and AGM construction for secure, leak-proof operation. If you’re looking for a high-performance UPS battery that delivers dependable run-time and extended standby life, the SPX12-540FR is an excellent, long-lasting battery choice.

Key Specifications

  • Model: SPX12-540FR
  • Brand: SigmasTek (genuine)
  • Nominal Voltage: 12 Volts
  • Capacity: 159 Ah
  • Watts per cell (15-min rate @ 1.67 V): 539 Watts per cell
  • Terminal Type: Internal Thread
  • Battery Type: Rechargeable sealed lead acid (AGM)
  • Technology: Absorbent Glass Mat (AGM)
  • Case: ABS (UL94 V-0) flame retardant case
  • Construction: Spill proof, no-leak construction — can be operated in any position
  • Self-discharge Rate: Less than 3% per month
  • Standby Life Expectancy: Up to 10 years in standby use
  • Cycle Life: Up to 300 cycles at 100% discharge in cycle service
  • Warranty: 3 Year Warranty
  • Certifications: UL Listed
  • Condition: Brand New, Factory Fresh
  • Performance: Superior performance guaranteed, high-rate discharge design
  • Packaging & Testing: Professionally tested and packaged
  • Typical Shipping: Orders for in-stock items typically ship within 24 hours

Benefits

The SigmasTek SPX12-540FR offers exceptional durability and extended operational life, making it a trusted choice for UPS and standby power systems. AGM construction and an UL-rated ABS case provide impact resistance and fire-retardant protection. With a self-discharge rate below 3% per month and up to 10 years of standby life, this battery reduces upkeep and provides dependable readiness over the long term.

As a high-performance UPS battery, the SPX12-540FR supports rapid high-rate discharge events while maintaining stable output, which is essential for safeguarding servers, network infrastructure, and emergency devices. Its spill-proof design and internal-thread terminals make installation straightforward and secure, even in confined or vibration-exposed environments.

Common applications include UPS backup for critical IT assets, emergency power systems, telecommunications equipment, and industrial standby uses. For cycle-intensive environments, this battery is rated for up to 300 cycles at 100% discharge, offering versatility for both standby and cycling roles.

Don’t wait to secure reliable backup power. Purchase the genuine SigmasTek SPX12-540FR replacement UPS battery today to get a high-performance UPS battery with proven long-lasting battery life, professional testing, and fast shipping.


Payment & Security

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