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Two sealed 12V 9AH AGM batteries with T2 terminals, rectangular black cases, 5.94 by 2.56 by 3.72 inches

BatteryJack inc.

BatteryJack inc. 2 Pack 12V 9AH UPS Replacement Battery for APC Back-UPS RS 800VA

SKU CH-4K98-M0MB5

Two 12V 9AH AGM batteries replace 7AH units in APC Back-UPS RS 800VA systems

  • Higher 9 Ah capacity extends runtime versus standard 7 Ah cells
  • AGM sealed construction prevents leaks and allows any orientation mounting
  • Maintenance-free design eliminates watering or electrolyte checks for the full service life
  • Two batteries per pack simplify swapping both cells in the APC Back-UPS RS 800VA
  • 24-month warranty backs the expected 4–7 year operational lifespan

Two-Pack 12V 9AH UPS Battery

This two-pack supplies 12V 9AH sealed lead-acid batteries built as direct replacements for the APC Back-UPS RS 800VA. They use AGM technology and T2 terminals to fit the original battery compartment. The maintenance-free design suits home offices and small server rooms needing reliable backup power.

Higher Capacity and Leak-Free Operation

Each unit delivers 9AH instead of the standard 7AH, extending runtime during outages. The sealed AGM construction prevents electrolyte leakage and allows safe operation in any orientation. Gas recombination exceeds 90 percent, so no watering or venting is required over the service life.

Compact Dimensions and Standard Terminals

The batteries measure 5.94in long, 2.56in wide and 3.72in high, matching the original footprint. T2 terminals connect directly to the UPS wiring harness without adapters. A 24-month warranty covers defects, and the non-spillable classification simplifies transport and storage.

Highlights

  • Higher 9 Ah capacity extends runtime versus standard 7 Ah cells
  • AGM sealed construction prevents leaks and allows any orientation mounting
  • Maintenance-free design eliminates watering or electrolyte checks for the full service life
  • Two batteries per pack simplify swapping both cells in the APC Back-UPS RS 800VA
  • 24-month warranty backs the expected 4–7 year operational lifespan

Specifications

No published specifications for this item yet.

Questions about this item

How often will the 12V 9AH sealed lead-acid batteries need replacement in the APC Back-UPS RS 800VA?

Expected battery life is 4-7 years; the sealed AGM design is maintenance-free and requires no electrolyte checks during that period.

What limits continuous runtime when the UPS is under sustained load?

The 9AH capacity at 12V determines total energy available; once depleted, the UPS shuts down until mains power returns and recharges the cells.

How much heat or noise do the two 13.16lb batteries produce during all-day operation?

Sealed AGM construction is non-spillable and gas recombination exceeds 90%, so the batteries run silently with negligible heat in normal use.

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