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Rectangular black sealed battery with two terminals on top

BatteryJack inc.

BatteryJack inc. PowerStar RBC35 12V 3.3Ah UPS Replacement Battery

SKU CH-5XK0-HCHA1

A 12V 3.3Ah AGM replacement battery for APC and CyberPower UPS units including RBC35, BE350 and 325SL models

  • Maintenance-free AGM design ensures stable, reliable backup power
  • 12 V 3.3 Ah capacity matches original UPS specifications exactly
  • Direct 100 % OEM replacement for APC RBC35 and RBC47 cartridges
  • Compact 5.28 × 2.64 × 2.4 in size fits existing battery compartments
  • Terminal spacing of 1.6 in allows drop-in installation without rewiring

Direct UPS Replacement

This PowerStar RBC35 battery is a 100% OEM replacement for APC BACK-UPS ES models including BE325, BE350, BE350C, BE350ES, BE350G and BE350U units. It also fits CyberPower CPS300SL, CPS320SL, CPS325SL and 325SL units plus the Conext CNB325. The 12V 3.3Ah AGM cell restores backup runtime without modification.

Drop-In Installation

The unit measures 5.28 inches long, 2.64 inches wide and 2.4 inches high with a terminal spacing of 1.6 inches, matching the original cartridge footprint. Maintenance-free AGM technology allows installation in any orientation and eliminates the need for fluid checks. It slides into the existing battery compartment and connects to the same leads.

Steady Long-Term Output

Advanced AGM chemistry delivers stable voltage across the discharge curve, supporting UPS emergency lighting, fire alarm panels, security systems and telecom gear. Expected service life spans four to seven years under normal float conditions. The sealed construction prevents leakage during continuous standby or repeated deep cycles.

Highlights

  • Maintenance-free AGM design ensures stable, reliable backup power
  • 12 V 3.3 Ah capacity matches original UPS specifications exactly
  • Direct 100 % OEM replacement for APC RBC35 and RBC47 cartridges
  • Compact 5.28 × 2.64 × 2.4 in size fits existing battery compartments
  • Terminal spacing of 1.6 in allows drop-in installation without rewiring

Specifications

No published specifications for this item yet.

Questions about this item

How long does the 3.3Ah capacity last before the UPS shuts down under full load?

Runtime depends on the UPS model and load level; the 3.3Ah rating gives the total charge available, not a fixed minutes figure.

Does the sealed AGM design stay cool and quiet during continuous daily cycling?

The maintenance-free AGM construction produces no fan noise and runs at ambient temperature; no active cooling is required.

Which APC or CyberPower UPS cartridge does the 1.6-inch terminal spacing match?

The 1.6-inch terminal pitch fits APC RBC35 and RBC47 cartridges as well as CyberPower 325SL, CPS300SL, CPS320SL, CPS325SL and Conext CNB325 units.

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