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CB Range  |  SKU: CB123.5X1-9908

Battery For Cyberpower Cp425g, 425 VA, 255W, UPS, 1 X 12v, 3.5ah

🚀 In stock and ready for shipment from our warehouse. Pickup NOT available for this product
Sale price $26.99 CAD Regular price $29.99
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Note: The 3.5Ah battery will provide approximately 16.67% longer runtime than the standard 3.0Ah version. Despite its higher capacity, it will replace the original battery perfectly and will fit and charge without any issues.
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Just a Quick Reminder!
Please double-check that the batteries you're ordering match the ones in your unit before completing your purchase.

Please note: We only supply the batteries shown in the images. Product images of devices are shown for reference only.

UPS Battery for CyberPower CP425G 425VA 255W – 12V 3.5Ah (1-Pack)

Reliable 12V 3.5Ah sealed lead acid AGM replacement battery designed to restore dependable backup performance for your CyberPower UPS system. Built for stable output, easy installation, and consistent standby power during outages.

12V Output 3.5Ah Capacity AGM Sealed Lead Acid T1 Terminals

Technical Specifications

BrandCB Range
Battery ModelCB123.5
Battery TypeSealed Lead Acid (AGM)
Voltage12V
Capacity3.5Ah
Number of Batteries1 Pack
Terminal TypeT1
Gross Weight1.35 Kg (2.98 lbs)
Dimensions5.24" × 2.64" × 2.36"
Height to Terminal2.6"
SKUCB123.5X1-9908
ApplicationUPS Backup Power

Key Benefits

  • Reliable Backup Power: Delivers stable 12V 3.5Ah performance to keep your UPS ready during outages.
  • Maintenance-Free AGM Design: Spill-proof sealed lead acid construction for safe, hassle-free operation.
  • Direct Replacement Fit: Designed for CyberPower CP425G 425VA 255W UPS systems requiring a compatible 12V 3.5Ah battery.
  • Compact UPS Sizing: Precision dimensions help ensure proper installation in supported UPS compartments.
  • Quick Terminal Connection: T1 terminals support straightforward installation using your existing wiring setup.
  • Built for Longevity: Premium construction helps maximize service life and energy retention.

Compatible Models

CyberPower

CP425G

Compatible with CyberPower CP425G 425VA 255W UPS systems requiring a 12V 3.5Ah battery with T1 terminals.

What’s Included

  • 1 × 12V 3.5Ah AGM Battery
  • T1 Terminal Configuration
  • Designed for UPS Replacement Use

Warranty & Returns

  • 30-Day Return Policy
  • 1-Year Warranty

Re-use your existing connectors and cables, as some assembly may be required. Always verify battery size, terminal type, and model compatibility before ordering.

Important Notice

  • Re-use your existing connectors and cables during installation.
  • Some assembly may be required depending on your UPS setup.
  • Handle and install the battery correctly for best performance and safety.

Why Choose This Replacement Battery?

This replacement battery is built to restore dependable backup performance for your CyberPower CP425G, helping protect connected equipment from sudden power loss with stable, maintenance-free AGM power.

Reliable Power for Uninterrupted Performance

Choose this CB Range 12V 3.5Ah UPS replacement battery to keep your CyberPower CP425G operating at peak performance. It is a dependable, compact, and easy-to-install solution for maintaining backup power when it matters most.

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🔋 What’s mAh All About?

mAh stands for milliamp hours—basically, how much "fuel" your battery can hold. A higher or lower mAh than your original battery? No worries! 🙌 It won’t affect charging or operation—just means your device might run a bit longer or shorter between charges. Still 100% compatible. Still 100% awesome. 💪✨

Before ordering please read

Ensure the original battery model number is mentioned in our product description and verify that your device model number is also listed in the description.

How to Look after your new lithium battery!!

See how to look after your battery if its lithium Lithium Care

Delivery and Shipping

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Technical Specifications

Battery For CyberPower CP425G UPS, 1 x 12V, 3.5Ah - 42Wh
Product Information
Product Model Battery For CyberPower CP425G UPS, 1 x 12V, 3.5Ah - 42Wh
Product Brand CB Range
Type UPS Batteries
SKU Number CB123.5X1-9908
Individual Battery Model CB123.5
Battery Replacement For Model CyberPower CP425G UPS, 1 x 12V, 3.5Ah - 42Wh
Individual Battery Amp Hour 3.5Ah
Number of Batteries in Kit 1
Chemistry AGM (Sealed Lead Acid)
Gross Weight (All Batteries) 1.35 Kg / 2.98 Lbs
Voltage 12V
Terminal Type T1
Battery Dimensions
Height 2.36 inches / 60 mm
Height to Top of Terminal 2.6 inches / 66 mm
Length 5.24 inches / 133 mm
Width 2.64 inches / 67 mm
Replacement battery kit configured for the CyberPower CP425G UPS using 1 x 12V 3.5Ah AGM battery with T1 terminals.
Latest Update: 14 March 2025

OEM Battery Cross Reference

Device Model Original Battery Replacement
CyberPower CP425G UPS Not specified CB123.5 / 12V 3.5Ah / T1
Confirmed compatible replacement configuration for the model listed above.
Compatible Model Details

CyberPower CP425G UPS uses a replacement battery configuration based on 1 x 12V 3.5Ah AGM battery with T1 terminals.

This replacement uses battery model CB123.5 and is supplied under SKU CB123.5X1-9908.

Battery Configuration

Voltage: 12V

Capacity: 3.5Ah

Energy: 42Wh

Chemistry: AGM (Sealed Lead Acid)

Terminal: T1

Pack Quantity: 1 battery

Physical Size

Length: 5.24 inches / 133 mm

Width: 2.64 inches / 67 mm

Height: 2.36 inches / 60 mm

Height to Top of Terminal: 2.6 inches / 66 mm

Gross Weight: 1.35 Kg / 2.98 Lbs

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