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SigmasTek  |  SKU: BW-5408

OPTI-UPS ES1000 / 1000ES UPS High Performance Compatible Replacement Battery Set 14.51 lb

23% off
New arrival
Sale price $81.99 USD Regular price $105.99
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High-quality 12 Volt 12 Ah battery for OPTI-UPS ES1000
Supports extended UPS runtime
Leak-proof and maintenance-free
Compact and robust build
Reliable power source for critical devices
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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Category

UPS Batteries

Brand Replacement

SigmasTek

Volts & Amps

12 Volts | 12 Ah

Terminal Type

F2

SigmasTek 12 Volts 12 Ah F2 OPTI-UPS — Compatible with ES1000

Restore reliable backup power for the ES1000 with the SigmasTek 12 Volts 12 Ah F2 OPTI-UPS replacement battery. This unit emphasizes compatibility with the ES1000 model and provides the consistent performance necessary for protecting vital electronics. Whether you manage a server closet, a small office, or critical home equipment, this replacement UPS battery is crafted to deliver stable output and trustworthy recharge behavior.

Key Specifications

  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 12 Ah
  • Terminal Type: F2
  • Compatible UPS Model: ES1000
  • Product Type: OPTI-UPS replacement

Benefits

This high-performance UPS battery is intended to offer long-term dependability and strong performance under typical UPS loads. The 12 Ah capacity is a practical balance of energy and form factor, making it suitable for extended runtime scenarios while remaining compact for easy handling and installation. As a long-lasting battery alternative for the ES1000, it supports regular cycling and standby usage with stable voltage delivery.

Durability is enhanced by the quality of the F2 terminal connections and the manufacturing standards associated with the SigmasTek product line. These features reduce connection problems and lower the risk of early failure, which is important in environments where uptime is essential. The battery’s design suits emergency power applications, from network equipment and servers to critical communications gear and lighting circuits.

Typical use cases include UPS backup for small IT racks, emergency power for telephone and network infrastructure, and auxiliary power for tools and control systems that require uninterrupted DC power. Because it is a replacement UPS battery engineered for the ES1000, users can quickly bring systems back to full protective capability without replacing the entire UPS hardware.

With an eye toward affordability and longevity, this SigmasTek battery provides a cost-effective route to restoring your ES1000’s runtime and ensuring mission-critical devices remain protected during outage events.

Ready to upgrade your ES1000 backup capacity? Add this reliable, high-performance UPS battery to your cart now and secure peace of mind.

Technical Specifications

Voltage12 Volts
Amp Hours12 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)3.86
Height (in.)3.7
Weight (lb.)14.5

Product Highlights

  • Brand Replacement : OPTI-UPS ES1000
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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