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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

  • Product typeKit/Package
  • Product 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.

How it compares

Measured against everything we stock in UPS Replacement Batteries, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 73% of the 3,915 comparable items (median $39.99).

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Specifications

Product
Brand nameOneAC
Product lineOneAC Batteries
Product typeKit/Package

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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