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SigmasTek  |  SKU: BW-3942

OPTI-UPS 400XR UPS High Performance Replacement Battery

Sale price $14.91 USD Regular price $18.84
Shipping calculated at checkout.

➤ Meets or exceeds OEM SLA battery specifications for OPTI-UPS 400XR

➤ Absorbent Glass Mat (AGM) technology ensures long-lasting power

➤ Maintenance-free with spill-proof construction for easy use

➤ U.L. Recognized and CE Certified for trusted safety standards

➤ Backed by a 1 year warranty for reliability


📦🚀 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 | 7.5 Ah

Terminal Type

F2

SigmasTek 12 Volts 7.5 Ah F2 Replacement Battery — Compatible with OPTI-UPS 400XR

Restore dependable backup power to your OPTI-UPS 400XR with this SigmasTek replacement UPS battery. Engineered to meet or exceed OEM SLA specifications, this battery delivers consistent performance and proven reliability so your equipment stays protected during outages and power disturbances. If you’re searching for a high-performance UPS battery that’s fully compatible with the OPTI-UPS 400XR, this long-lasting battery is an ideal, cost-effective replacement.

Key Specifications

  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 7.5 Ah
  • Terminal Type: F2
  • Technology: Absorbent Glass Mat (AGM)
  • Design: High Rate Discharge Design
  • Maintenance: Maintenance-Free with Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year
  • Compatible UPS Model: OPTI-UPS 400XR
  • Typical Applications: Emergency Power Supply; Battery Powered Tools

Benefits

With AGM construction and a maintenance-free design, this replacement UPS battery minimizes upkeep while maximizing reliability—perfect for continuous-use environments. The high rate discharge design provides the surge capacity needed for UPS systems to support critical loads during outages, making it a trusted choice for servers, communication gear, and medical or industrial equipment.

Safety and performance certifications (U.L., CE) back up its build quality, and the spill-proof housing simplifies installation within enclosed UPS cabinets. As a high-performance UPS battery, the SigmasTek unit provides stable output and consistent runtime, supporting both short-duration high-current events and regular backup cycles. For emergency power supply duties and for powering battery operated tools, this battery stands up to demanding conditions while delivering a long-lasting battery experience.

Each battery ships brand new and factory fresh with a 1 year warranty—ensuring you get a reliable replacement UPS battery that’s compatible with the OPTI-UPS 400XR and ready to protect your investment.

Don’t wait until the next outage—purchase this long-lasting, high-performance UPS battery for your OPTI-UPS 400XR today and keep critical systems running when it matters most.



Payment & Security

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