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Rectangular black sealed lead-acid battery cartridge with two terminals on top

BatteryJack inc.

BatteryJack inc. APC RBC35 ups replacement battery for Back-UPS ES BE350C BE350R

SKU CH-CD15-J1TNF

Replacement battery cartridge for compatible Back-UPS ES models, using 12 V 3.3 AH AGM cells

  • 100% OEM replacement fits BE350C and BE350R
  • Advanced AGM technology gives maintenance-free operation
  • Expected battery life of 4-7 years
  • Compact 5.28 x 2.64 x 2.4 inch design fits tight UPS bays
  • 6 inch terminal spacing matches original cartridge exactly

Direct OEM Replacement for BE350C and BE350R

This 12 V 3.3 Ah AGM cartridge is built as a 100 % OEM replacement for the APC RBC35. It fits the Back-UPS ES BE350C and BE350R units and uses maintenance-free sealed lead-acid technology. The expected service life spans four to seven years under normal float conditions.

Suitable for owners of listed Back-UPS ES models

Buyers with a BE350C, BE350R or compatible CyberPower unit can install this cartridge directly. Those who need a different voltage, capacity or form factor should look at other SKUs. The 1.6 inch terminal spacing matches the original layout exactly.

Designed for continuous float rather than cyclic

Under sustained load the AGM chemistry delivers stable voltage without watering or ventilation. The sealed case prevents electrolyte leakage during long backup events. Capacity remains consistent across the rated temperature range for the duration of the warranty period.

Highlights

  • 100% OEM replacement fits BE350C and BE350R
  • Advanced AGM technology gives maintenance-free operation
  • Expected battery life of 4-7 years
  • Compact 5.28 x 2.64 x 2.4 inch design fits tight UPS bays
  • 6 inch terminal spacing matches original cartridge exactly

Specifications

No published specifications for this item yet.

Questions about this item

Which UPS models does the RBC35 cartridge fit?

The RBC35 cartridge fits APC Back-UPS ES BE350C and BE350R units, plus the BE350, BE350ES, BE350G, BE350U, ES 325 and BE325-FR models.

Will the replacement battery work with the existing charger in my older BE350C unit?

Yes, the 12 V 3.3 Ah AGM cell uses the same charging profile as the original RBC35, so the UPS charger requires no adjustment.

How can I verify the new battery is recognised after installation?

Power on the UPS; the green “On Line” LED should stay solid and the self-test will complete without a red “Replace Battery” warning.

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