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SigmasTek  |  SKU: BW-4858

Best Technologies FERRUPS FE 500VA UPS High Performance Replacement Battery Set

Sale price $165.64 USD Regular price $209.20
Shipping calculated at checkout.

➤ Includes 2 SigmasTek SP12-35 NB batteries (12V, 35AH) for FERRUPS FE 500VA

➤ High rate discharge design supports emergency and UPS power needs

➤ Valve regulated and spill-proof for safe, maintenance-free operation

➤ Low self-discharge and vibration resistant for dependable performance

➤ Factory fresh, U.L. recognized, CE 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 | 35 AH

Terminal Type

Nut & Bolt

Replacement SigmasTek SP12-35 NB Batteries for Best Technologies FERRUPS FE 500VA UPS

Ensure uninterrupted performance for your Best Technologies FERRUPS FE 500VA Uninterruptible Power Supply with this compatible replacement UPS battery set. This pair of SigmasTek SP12-35 NB batteries supplies steady, high-rate discharge capability and is built to provide safe, long-term backup power. Designed to be a reliable option for small UPS systems and emergency power applications, these batteries deliver trusted results when it matters most.

Key Specifications

  • Quantity: 2 batteries per set
  • Battery Model: SigmasTek SP12-35 NB
  • Voltage: 12 Volts
  • Capacity: 35 AH (Amp-hours)
  • Terminal Type: Nut & Bolt
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction (sealed)
  • Features: Low Self-discharge, High Vibration Resistance, Superior Performance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year
  • Compatible With: Best Technologies FERRUPS FE 500VA UPS

Benefits

This replacement set serves as a high-performance UPS battery solution for the Best Technologies FERRUPS FE 500VA, engineered to handle high rate discharge scenarios without compromising voltage stability. The valve-regulated, spill-proof build lowers maintenance needs while improving safety and installation flexibility. Low self-discharge properties preserve capacity over time so your replacement batteries remain ready after storage periods, and high vibration resistance improves durability in less stable mounting locations.

These batteries are presented as a long-lasting battery option for critical backup applications: Uninterruptible Power Supply (UPS) units, emergency power systems, and battery-powered tools. They are perfect for maintaining runtime for small servers, modems/routers, network switches, security systems, and other sensitive electronics that demand consistent, clean power during outages. The nut & bolt terminal style makes for a secure connection when using the original cables and hardware from your FE 500VA UPS unit.

Every battery set is tested by our technically savvy staff to confirm performance that meets or exceeds OEM specifications—ensuring you receive a reliable, high-quality replacement UPS battery set. These brand-new SigmasTek cells come with a one-year warranty for added confidence.

Replace your worn batteries now and get peace of mind—order the SigmasTek SP12-35 NB replacement UPS battery set for your Best Technologies FERRUPS FE 500VA today. Contact customer service at for assistance and enjoy fast shipping on in-stock items.



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