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A rectangular 12 V 3000 mAh sealed lead-acid battery with two terminals on top

BatteryJack inc.

BatteryJack inc. 12V 3000 mAh UPS Replacement Battery for APC RBC35

SKU CH-KCTC-MRTDT

12 V 3000 mAh AGM replacement battery fits APC RBC35 and RBC47 UPS units

  • Maintenance-free AGM design eliminates routine upkeep
  • 3 Ah capacity delivers reliable backup power
  • Direct RBC35 replacement ensures simple installation
  • 12 V 3000 mAh rating matches original specifications
  • Compatible with APC BE350 and CyberPower CPS325SL

Replacement for APC RBC35

This 12 V 3000 mAh sealed lead-acid battery is a direct replacement for the APC RBC35 cartridge. It uses AGM technology for maintenance-free operation in compatible UPS units. The battery suits home-office and small-business backup power needs. It also fits several CyberPower and other branded UPS models listed by the supplier.

AGM chemistry and terminal spacing

The AGM design provides stable, spill-proof performance without watering or ventilation requirements. Terminal centres are spaced 1.6 inches apart, matching the original cartridge layout. Expected service life ranges from four to seven years under normal float conditions. The compact 5.28 by 2.64 by 2.4 inch form factor fits the existing battery compartment.

3.3 Ah capacity match

Capacity is rated at 3.3 Ah at the 20-hour rate, which determines runtime for the supported UPS models. A lower capacity would shorten backup time; a higher capacity would not fit the cartridge dimensions. Verify that your UPS uses the RBC35 or RBC47 cartridge before ordering. This single specification confirms whether the battery is the correct part.

Highlights

  • Maintenance-free AGM design eliminates routine upkeep
  • 3 Ah capacity delivers reliable backup power
  • Direct RBC35 replacement ensures simple installation
  • 12 V 3000 mAh rating matches original specifications
  • Compatible with APC BE350 and CyberPower CPS325SL

Specifications

No published specifications for this item yet.

Questions about this item

Is the 3000 mAh capacity the right choice for an APC RBC35 cartridge?

Yes, the 12 V 3.3 Ah rating matches the original RBC35 specification and fits the listed APC Back-UPS ES models.

What runtime can I expect from the 3.3 Ah rating in a typical Back-UPS ES 350?

Runtime depends on the connected load; at full 350 W the battery delivers only a few minutes, while lighter loads extend it proportionally.

How do the F1 terminals with 1.6 inch spacing connect to the UPS?

The 1.6 inch centre-to-centre F1 terminals plug directly into the RBC35 wiring harness without adapters.

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