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Two square 12V 5A SLA batteries in a replacement kit

RefurbUPS

RefurbUPS ONeAc ON400I-SN 12V 5A 2-pack UPS replacement battery

SKU CH-9K6V-309NN

Two 12 V 5 A sealed lead-acid batteries replace the ON400I-SN cartridge

  • TypeKit/Package
  • Weight5
  • Two high-rate 12 V batteries deliver reliable backup power
  • Kit includes both cells for a complete UPS refresh
  • Factory-fresh cells ensure consistent discharge performance
  • Step-by-step guide simplifies safe battery installation
  • Compatible replacement restores UPS runtime with confidence

Two-pack 12 V 5 A UPS battery kit

This kit contains two sealed lead-acid batteries rated at 12 volts and 5 ampere-hours each. They are built as direct replacements for the OneAC ON400I-SN cartridge. The pack arrives factory-fresh and includes step-by-step installation instructions. It suits administrators who need a quick, drop-in refresh for compatible UPS units.

Ideal for single-cartridge UPS refreshes

The twin-battery bundle matches the original cartridge layout, so it fits without rewiring or adapter plates. Buyers who manage multiple UPS models or require higher-capacity cells should verify their unit’s specifications before ordering. Units that demand a different voltage, ampere-hour rating or physical footprint will not accept this kit.

12 V 5 Ah per cell decides compatibility

Each cell delivers 12 volts and 5 ampere-hours, the exact electrical profile the ON400I-SN cartridge expects. If the host UPS calls for a different voltage or capacity the batteries will not charge or run correctly. Confirm those two numbers against the UPS manual before purchasing.

Highlights

  • Two high-rate 12 V batteries deliver reliable backup power
  • Kit includes both cells for a complete UPS refresh
  • Factory-fresh cells ensure consistent discharge performance
  • Step-by-step guide simplifies safe battery installation
  • Compatible replacement restores UPS runtime with confidence

Specifications

BrandOneAC
SeriesOneAC Batteries
TypeKit/Package
Weight5

Questions about this item

Will the two 12 V 5 A batteries generate noticeable heat or noise during continuous UPS operation?

The sealed lead-acid cells produce no fan noise and only minimal warmth under normal float charging.

What existing UPS hardware is required before installing this ON400I-SN replacement kit?

You need a compatible UPS unit that accepts two 12 V 5 A square SLA batteries wired in series.

Can the ON400I-SN kit be used alongside older battery strings already installed in the same UPS?

Mixing fresh 12 V 5 A cells with aged batteries is not recommended; replace the full set for balanced runtime.

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