ONEAC ON2000I-SN UPS High Performance Compatible Replacement Battery Set 50.64 lb
— Ready to ship immediately
Check that your old battery model number and device model to match our description. This makes sure they work together.
We ship your order same day if you buy it before 4 PM EST.
ONEAC ON2000I-SN UPS High Performance Compatible Replacement Battery Set is backordered and will ship as soon as it is back in stock.
Let customers speak for us
Send Your Battery Photo
Expert Technician 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 BATTERY IMAGE
Product & Solutions Expert
✉ sales@batteryweb.com
Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
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.
Category
Brand Replacement
SigmasTek
Volts & Amps
12 Volts | 18 Ah
Terminal Type
Nut & Bolt
SigmasTek SP12-18HR Replacement Battery Set for ONEAC ON2000I-SN UPS
Restore reliable runtime to your ONEAC ON2000I-SN with this brand new replacement UPS battery set. Designed for compatibility, dependable performance, and built-in reliability, these SigmasTek SP12-18HR batteries deliver the high-rate output your ONEAC ON2000I-SN expects. This replacement UPS battery set is ideal when you need a high-performance UPS battery that provides consistent power during outages. Please note: you must reuse all existing cables and hardware from your original configuration to connect these batteries.
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
These SigmasTek batteries provide a long-lasting battery solution for your ONEAC ON2000I-SN UPS. The high rate discharge design ensures rapid, high-power delivery when your UPS requires short bursts of energy, making this a high-performance UPS battery suited for demanding situations. Valve regulated, spill-proof construction and robust vibration resistance increase durability and safety during transport and operation. Low self-discharge means the batteries retain capacity while in storage so your replacement set is ready when you need it.
Reliability is essential in emergency power systems — these batteries are U.L. recognized and CE certified, factory fresh, and tested to meet or exceed OEM specifications. Typical applications include UPS units, emergency power supply systems, and battery-powered tools. Whether you’re maintaining IT infrastructure, supporting critical network equipment, or preparing backup systems for abrupt outages, this replacement UPS battery set gives you the confidence of consistent runtime and dependable performance.
Orders for in-stock items typically ship within 24 hours. If you need assistance selecting or installing replacement batteries for the ONEAC ON2000I-SN, contact our customer service team at or email us for expert help. Choose a long-lasting battery solution that restores full capability to your UPS quickly and affordably.
Ready to replace the batteries in your ONEAC ON2000I-SN? Buy this high-performance UPS battery set now and get dependable power when it matters most.
Technical Specifications
Product Highlights
- Brand Replacement : ONEAC ON2000I-SN
- Manufacturer: SigmasTek
- Product Type: UPS Batteries
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.




