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SigmasTek  |  SKU: BW-5052

ONEAC ON2000AU-SN UPS High Performance Compatible Replacement Battery Set

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

➤ Set of 4 new SigmasTek SP12-18HR batteries (12V 18AH) for ONEAC ON2000AU-SN

➤ High rate discharge design for reliable short-term power bursts

➤ Valve regulated, spill-proof technology for safe maintenance-free use

➤ Low self-discharge extends battery life during storage

➤ Certified safety with 1-year warranty and OEM specification compliance


📦🚀 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

SigmasTek SP12-18HR Replacement Battery Set for ONEAC ON2000AU-SN UPS

Keep your ONEAC ON2000AU-SN running at peak performance with this replacement UPS battery set featuring SigmasTek SP12-18HR batteries. Built for compatibility and engineered for consistent output, this high-performance UPS battery pack offers reliable backup power and fast discharge capability for demanding loads. Remember to reuse your existing cables and hardware when installing this battery set.

Key Specifications

  • Brand: SigmasTek
  • Model: SP12-18HR
  • Voltage: 12 Volts
  • Capacity: 18 AH (Amp-hours)
  • Quantity: 4 batteries (battery set)
  • Terminal Type: Nut & Bolt
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated, Spill Proof
  • Features: Low Self-discharge, High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year

Benefits

This replacement UPS battery set provides a durable, long-lasting battery option for the ONEAC ON2000AU-SN. The high-rate discharge capability is ideal for UPS applications that demand elevated power output over short intervals, ensuring your critical systems remain protected during transitions to generator or power restoration. As a high-performance UPS battery, the SigmasTek SP12-18HR is engineered for consistent performance, low maintenance, and extended shelf life due to its low self-discharge properties.

Safety and longevity are addressed through the valve regulated, spill-proof construction and high vibration resistance—features that make these batteries suitable for rack-mounted UPS systems, transportation, and field installations. Certified by U.L. and CE, they meet recognized safety and performance standards, and each battery is factory fresh and tested to meet or exceed OEM expectations. Typical applications include uninterruptible power supply units, emergency power supply systems, and battery-powered tools requiring dependable burst power.

Our knowledgeable support team is available at or via email if you need assistance choosing or installing replacement batteries for the ONEAC ON2000AU-SN. In-stock orders usually ship within 24 hours, getting you back to full protection quickly.

Don’t wait for a failure — purchase this long-lasting battery replacement set for your ONEAC ON2000AU-SN today and ensure uninterrupted protection for your critical equipment.


Payment & Security

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