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Rectangular black sealed 12V 2.3AH AGM battery D5739 UB1222

BatteryJack inc.

BatteryJack inc. 12V 2.3AH UPS Replacement Battery D5739 UB1222

SKU CH-9225-Q6BQK

A 12 V, 2.3 Ah sealed AGM battery fits D5739 and UB1222 models with 100 % OEM compatibility and maintenance-free operation

  • Sealed construction prevents electrolyte leakage from terminals or case
  • AGM glass-fibre separators absorb electrolyte for steady service and long life
  • Gas recombination design recombines over 90% of generated gas during use
  • Maintenance-free operation requires no water top-ups or specific-gravity checks
  • Fits Universal D5739 and UB1222 models as a 100% OEM replacement

12 V 2.3 Ah UPS replacement battery

This 12 V 2.3 Ah sealed lead-acid battery is built as a direct replacement for UPS units that specify the D5739 or UB1222 form factor. It targets administrators and home-office users who need a drop-in power cell to restore runtime on an existing uninterruptible power supply.

AGM sealed construction with gas recombination

Advanced AGM technology absorbs the electrolyte in glass-mat separators so the battery cannot leak and can be mounted in any orientation. The sealed design recombines over 90 % of generated gas, eliminating the need for water top-ups or specific-gravity checks during its expected four-to-seven-year float life.

Check the UPS model and connector layout before

Verify that your UPS lists D5739 or UB1222 as the approved replacement code and confirm the terminal style matches the original pack. Ensure the charger voltage is set for a 12 V AGM cell and that the enclosure has space for the same physical footprint. Buyers whose UPS requires a different voltage, capacity or terminal arrangement should select the correct alternative.

Highlights

  • Sealed construction prevents electrolyte leakage from terminals or case
  • AGM glass-fibre separators absorb electrolyte for steady service and long life
  • Gas recombination design recombines over 90% of generated gas during use
  • Maintenance-free operation requires no water top-ups or specific-gravity checks
  • Fits Universal D5739 and UB1222 models as a 100% OEM replacement

Specifications

No published specifications for this item yet.

Questions about this item

What voltage does the 12V 2.3AH UPS battery deliver in practice?

The battery provides a nominal 12 volts and a capacity of 2.3 ampere-hours, which determines how long it can power a UPS load before recharging.

What physical format must the UPS compartment accept for the D5739 UB1222 replacement?

The unit is a sealed AGM block designed to fit the standard D5739 or UB1222 footprint, so the compartment must match those case dimensions and terminal layout.

How is the battery installed and what step is often missed?

Insert the battery into the UPS tray, connect the leads observing correct polarity, then allow a full initial charge before putting the UPS into service.

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