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A sealed lead-acid battery cartridge for UPS systems

RefurbUPS

RefurbUPS ONE300D 12V UPS replacement battery kit

SKU CH-ZCS3-ES37A

A 12 V replacement battery kit for ONE300D UPS units, supplied factory-fresh with installation instructions

  • Product typeKit/Package
  • Product weight6
  • Compatible 12 V replacement kit for ONE300D UPS units
  • Factory-fresh sealed lead-acid cells deliver reliable backup power
  • High-rate discharge design supports demanding load conditions
  • Includes two batteries and step-by-step installation instructions
  • Ready to ship for immediate UPS restoration

Compatible UPS Battery Kit

This replacement kit is designed for UPS units requiring the ONE300D form factor. It contains two 12 V high-rate discharge SLA batteries intended to restore runtime in compatible power protection systems. The package arrives factory fresh and includes comprehensive installation instructions for straightforward servicing.

For Direct Replacement Only

The kit suits owners of a ONE300D UPS who need an exact-match battery cartridge to return their unit to service. It is not suitable for buyers who require a different voltage, capacity, or physical layout, nor for those needing a single battery rather than a paired set.

Two 12 V Batteries Included

The specification that determines fit is the inclusion of two 12 V 7 A SLA cells pre-wired for the ONE300D cartridge. Verifying that the original UPS uses this dual-battery configuration is the single check required before purchase.

How it compares

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

Price $21.99
Cheaper than about 69% 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

Does the ONE300D kit include the wiring harness or connectors needed for my UPS?

The kit provides two 12 V 7 Ah sealed lead-acid cells and printed installation instructions; reuse the original harness and connectors from the unit you are servicing.

Will the 12 V 7 Ah cells in this kit fit the same battery tray as the original ONE300D pack?

Yes, the replacement cells match the voltage and capacity of the factory pack, so they occupy the same tray space without modification.

How can I verify the new batteries are performing correctly after installation?

Run a self-test from the UPS front panel or management software; a passing result and normal runtime during a brief load test confirm the kit is working as intended.

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