For questions, quotes, or help finding the right battery, feel free to email us at sales@batteryweb.com

New collections added! Learn more

🎉 First Order Special 🎉

First-time shoppers get 5% OFF on batteries & accessories!

WELCOME5
SigmasTek  |  SKU: BW-5545

Best Technologies BAT-0048 UPS High-Performance Compatible Replacement Battery

Sale price $216.64 USD Regular price $314.12
Shipping calculated at checkout.

➤ Compatible with Best Technologies and Best Power UPS models

➤ Factory fresh and backed by a 1-year warranty

➤ Tested by experts to guarantee OEM-level performance

➤ Use existing cables and hardware for seamless replacement

➤ Fast shipping on in-stock items, typically within 24 hours


📦🚀 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 | 100 Ah

Terminal Type

Internal Thread

SigmasTek SP12-100 IT Replacement for Best Technologies BAT-0048 UPS

Designed for compatibility and dependable performance, the SigmasTek SP12-100 IT is an ideal replacement UPS battery for the Best Technologies BAT-0048 UPS. This 12 Volts 100 AH battery offers high-rate discharge capabilities and low self-discharge for reliable standby readiness. Please ensure you reuse all existing cables and hardware from your original BAT-0048 configuration when installing this replacement UPS battery.

Key Specifications

  • Battery model: SigmasTek SP12-100 IT
  • Voltage: 12 Volts
  • Capacity: 100 AH (Amp-hours)
  • Terminal type: Internal Thread
  • 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
  • Compatible with: Best Technologies BAT-0048 UPS
  • Installation note: Requires use of existing cables and hardware from original configuration
  • Brand: SigmasTek

Benefits

This replacement UPS battery combines rugged construction with strong performance characteristics to provide a long-lasting battery option for your Best Technologies BAT-0048. Its valve-regulated spill proof design reduces maintenance and increases safety, while low self-discharge ensures the unit remains ready for critical duty. As a high-performance UPS battery designed for high rate discharge, it supplies the short-duration burst currents needed during heavy load events.

Whether you are protecting servers, telecommunications equipment, or emergency power systems, the SigmasTek SP12-100 IT is built to deliver consistent energy and dependable service life. High vibration resistance and certification by U.L. and CE underscore its suitability for demanding commercial and industrial environments. It is also appropriate for battery powered tools and other applications that require quick-release power with predictable performance.

Every unit is tested to ensure it meets or exceeds OEM requirements, so you can replace your BAT-0048 battery with confidence. This high-performance UPS battery is a cost-effective way to restore runtime and reliability without compromising on safety or quality.

Don’t wait—order the SigmasTek SP12-100 IT replacement UPS battery for your Best Technologies BAT-0048 today to secure reliable, long-lasting backup power.


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.