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Two square 12V5A batteries in a replacement kit

RefurbUPS

RefurbUPS ONeAc ON400A-SN Compatible Replacement Battery Kit (2×12V5A)

SKU CH-FXAG-0F7RW

A compatible replacement kit containing two 12V5Ah sealed lead-acid batteries for UPS units

  • Product typeKit/Package
  • Product weight10
  • Compatible kit replaces original UPS batteries
  • Two 12 V 5 Ah sealed lead-acid cells included
  • Factory-fresh stock ensures reliable backup power
  • Step-by-step instructions simplify installation
  • 10 kg total weight for stable mounting

Replacement Battery Kit for OneAC UPS

This kit supplies two 12V5A sealed lead-acid batteries built as a direct replacement for the OneAC ON400A-SN cartridge. Each unit is factory fresh and rated for high-rate discharge, ensuring the UPS can deliver its full runtime when mains power fails. The package includes step-by-step installation instructions so the swap can be completed without special tools.

Suitable for OneAC UPS owners needing

Technicians maintaining a OneAC ON400A-SN UPS will find the exact voltage and capacity match they require. Buyers whose equipment uses a different battery count, voltage, or form factor should look elsewhere because this kit is tailored to the specific cartridge layout described above.

Critical spec: two 12V5A blocks in one kit

The defining detail is the pair of 12V5A batteries that together replicate the original cartridge. If the target UPS calls for a different voltage, capacity, or quantity of blocks, this kit will not fit or function correctly.

How it compares

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

Price $22.99
Cheaper than about 68% 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

What UPS models accept the ON400A-SN battery kit with its two 12V5A cells?

The kit is built as a direct replacement for UPS units that use the ON400A-SN cartridge containing two 12V5A sealed lead-acid batteries.

Can I mix these new 12V5A batteries with older cells still inside my UPS?

No. Both 12V5A batteries must be replaced together so the string voltage and capacity stay matched.

How do I confirm the kit is working after I install the two 12V5A batteries?

Power on the UPS, let it charge fully, then run a self-test or pull the mains plug to verify the unit holds the load on battery power.

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