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-4940

Deltec 2026 UPS Compatible Replacement Battery Set

Sale price $359.93 USD Regular price $521.90
Shipping calculated at checkout.

➤ Replacement battery set for Deltec 2026 UPS unit

➤ Includes 4 high capacity 12V 26AH batteries

➤ Valve regulated, spill-proof with low self-discharge

➤ UL listed, CE certified, and 1-year warranty

➤ Factory fresh and OEM compatible


📦🚀 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 | 26 Ah

Terminal Type

Nut & Bolt

Replacement Battery Set for Deltec 2026 (4 SigmasTek SP12-26 NB)

Tailored for the Deltec 2026, this replacement UPS battery set offers reliable compatibility, strong performance, and proven durability. Each kit includes four SigmasTek SP12-26 NB batteries (12 Volts, 26 AH) engineered for high-rate discharge scenarios, so your Deltec 2026 can deliver the surge capacity needed during outages or heavy transient loads. This replacement UPS battery pack is an efficient, tested solution to restore and maintain backup capability.

Key Specifications

  • Battery model: SigmasTek SP12-26 NB
  • Quantity: 4 batteries per set
  • Voltage: 12 Volts
  • Capacity: 26 AH
  • Terminal type: Nut & Bolt
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Self-discharge: Low Self-discharge
  • Vibration resistance: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatible UPS model: Deltec 2026
  • Typical applications: Uninterruptible Power Supply (UPS) Units, Emergency Power Supply, Battery Powered Tools

Benefits

This replacement set emphasizes longevity and dependable output for mission-critical backup systems. The valve-regulated, spill-proof construction and low self-discharge characteristics keep the batteries safe and ready, while high vibration resistance extends service life in challenging environments. These features collectively contribute to a long-lasting battery investment that supports sustained UPS performance.

As a high-performance UPS battery solution, these SigmasTek cells are well-suited to the Deltec 2026’s high-rate discharge requirements. They perform reliably during short-duration, high-power demands—ideal for UPS units protecting servers, emergency power supply setups, and battery-powered tools that need reliable surge power. Each battery is new, factory fresh, and tested to meet or exceed OEM expectations to ensure consistent, high-performance UPS battery behavior.

Installation uses your existing cables and hardware for a straightforward swap, minimizing downtime and simplifying maintenance. Backed by a one-year warranty, this replacement UPS battery set delivers both value and peace of mind for maintaining your Deltec 2026’s backup capabilities.

Secure reliable backup power now—order this long-lasting, high-performance replacement UPS battery set for the Deltec 2026 and keep your systems protected.


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.