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SigmasTek  |  SKU: BW-5045

ONEAC ONXBCU UPS High Performance Replacement Battery Set

Sale price $155.20 USD Regular price $225.03
Shipping calculated at checkout.

➤ Includes 4 SigmasTek SP12-18HR batteries (12V, 18 AH)

➤ High rate discharge design for efficient UPS performance

➤ Valve regulated, spill-proof, and vibration resistant

➤ Low self-discharge preserves battery charge over time

➤ Certified quality with U.L. and CE marks plus 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 | 18 Ah

Terminal Type

Nut & Bolt

Engineered for compatibility with the ONEAC ONXBCU UPS, this replacement battery set uses factory-fresh SigmasTek cells to provide dependable runtime, consistent performance, and the durability required for critical backup systems. If your ONEAC ONXBCU needs a reliable, long-lasting battery replacement, this set is a proven solution.

Replacement Battery Set for ONEAC ONXBCU

Key Specifications

  • Included batteries: 4 x SigmasTek SP12-18HR
  • Voltage: 12 Volts
  • Capacity: 18 AH
  • 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
  • Terminal type: Nut & Bolt
  • Brand: SigmasTek (for ONEAC)

Benefits

  • Valve-regulated, spill-proof design delivers safe, low-maintenance operation in indoor UPS installations and emergency cabinets.
  • High rate discharge design ensures the pack can support sudden load increases and transfer events, making it a reliable high-performance UPS battery option.
  • Low self-discharge enhances shelf and standby life, helping this pack perform as a long-lasting battery solution in backup scenarios.
  • High vibration resistance reduces sensitivity to mechanical stress and extends service life in rack and mobile applications.
  • U.L. and CE certifications demonstrate compliance with safety standards, providing peace of mind for commercial and industrial users.
  • Tested to meet or exceed OEM specifications, these SigmasTek SP12-18HR batteries restore dependable runtime at a competitive price point.
  • Ideal for Uninterruptible Power Supply (UPS) units, emergency power supply systems, and battery-powered tools that need reliable backup power.
  • Important installation note: you must use all existing cables and hardware from your original configuration to connect these batteries; our support team is available to help.

Ready to upgrade your ONEAC ONXBCU with a dependable replacement UPS battery? Add this high-performance, long-lasting battery set to your cart and restore critical power protection today.


Payment & Security

Payment methods

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