For support or quotes: sales@batteryweb.com

🎉 First Order : Get 10% OFF! 🎉

WELCOME10
SigmasTek  |  SKU: BW-4788

Best Power FERRUPS FER 1.8KVA UPS Compatible Replacement Battery Set

Sale price $331.28 USD Regular price $418.40
Shipping calculated at checkout.

➤ Includes 4 brand new 12V 35AH SigmasTek SP12-35 NB batteries

➤ High rate discharge design ideal for emergency power

➤ Low self-discharge ensures battery longevity

➤ Valve regulated, spill-proof for leak prevention

➤ U.L. and 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.

📸 Send Your Battery Photo / Unsure? Expert Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR IMAGE

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 Power FERRUPS FER 1.8KVA UPS

When uptime matters, choose a replacement UPS battery set engineered for performance and reliability. This SigmasTek SP12-35 NB 4-pack is a direct-fit solution for the Best Power FERRUPS FER 1.8KVA, offering high-rate discharge capability, durable construction, and reliable runtime. These brand-new batteries are tested to meet stringent standards and provide a long-lasting battery option for protecting critical systems and equipment.

Key Specifications

  • Included quantity: 4 batteries (battery 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
  • Self-discharge: Low Self-discharge
  • Durability: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Installation note: Must use all existing cables and hardware from the original configuration to connect the new UPS batteries

Benefits

These replacement batteries deliver the rugged reliability and consistent performance required by UPS systems like the Best Power FERRUPS FER 1.8KVA. The high rate discharge design supports brief periods of elevated power demand, making these batteries ideal for protecting servers, networking equipment, and control systems during outages. The valve-regulated, spill-proof construction reduces maintenance concerns while improving installation safety, and the low self-discharge helps maintain charge over extended storage periods so the batteries remain ready for use.

A high-performance UPS battery must be durable — the SigmasTek units offer high vibration resistance to withstand rack-mounted or on-site deployments without compromising longevity. Their U.L. recognition and CE certification affirm adherence to recognized safety and quality benchmarks, and the included 1 year warranty provides added assurance. Typical applications include Uninterruptible Power Supply (UPS) systems, emergency backup power setups, and battery-powered tools where dependable short-term high output is necessary.

All batteries are brand new and factory tested to ensure they meet or exceed OEM expectations. For safe and correct installation, retain and reuse your original cables and hardware when replacing the batteries in your FER 1.8KVA UPS. This set is an excellent choice if you want a replacement UPS battery that combines dependable performance, affordability, and long service life.

Ensure your Best Power FERRUPS FER 1.8KVA remains fully protected — add this long-lasting, high-performance battery set to your cart and secure fast, reliable backup power today.



Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.