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Rectangular black sealed battery cartridge with two terminals

PowerStar

PowerStar RBC35 12V 3.3AH UPS replacement battery

SKU CH-BT11-Y0VYC

12V 3.3AH AGM battery cartridge replaces APC RBC35 and compatible CyberPower models in UPS units

  • Drop-in 100% OEM replacement for APC Back-UPS ES models
  • Maintenance-free AGM design keeps UPS running without user intervention
  • Compact 5.28 × 2.64 × 2.4 in size fits tight battery bays
  • 12 V 3.3 Ah capacity restores original runtime to compatible units
  • Expected 4-7 year service life reduces replacement frequency

PowerStar RBC35 12V 3.3AH UPS Battery

This PowerStar RBC35 is a 12V 3.3AH sealed lead-acid AGM battery designed as a direct OEM replacement for compatible UPS units. It provides backup power for connected equipment during mains failures. The maintenance-free design suits home offices, small businesses and network closets that rely on continuous uptime for essential devices.

Drop-in cartridge design simplifies installation

The cartridge format aligns with the original battery compartment, requiring no wiring modifications or special tools. Terminal spacing of 1.6 inches matches the host UPS connectors for a secure fit. Common issues arise only if the replacement is delayed beyond the 4-7 year expected life, leading to reduced runtime or failure to hold charge during an outage.

Ideal for APC Back-UPS ES BE350C

This unit suits owners of the specific APC and CyberPower models named in the compatibility list who need a like-for-like swap. It is not suitable for UPS systems requiring higher amp-hour ratings, different terminal layouts or voltages other than 12V. Buyers needing extended runtime or larger capacity should look at higher-specification cartridges.

Highlights

  • Drop-in 100% OEM replacement for APC Back-UPS ES models
  • Maintenance-free AGM design keeps UPS running without user intervention
  • Compact 5.28 × 2.64 × 2.4 in size fits tight battery bays
  • 12 V 3.3 Ah capacity restores original runtime to compatible units
  • Expected 4-7 year service life reduces replacement frequency

Specifications

No published specifications for this item yet.

Questions about this item

How can I confirm the PowerStar RBC35 is working correctly after installing it in my APC Back-UPS ES BE350?

The UPS should power on without a battery error, run a self-test successfully, and hold the connected load for the expected runtime during a brief power interruption.

What comes with the RBC35 cartridge and do I need any extra cables or hardware?

The cartridge includes the 12V 3.3AH AGM battery pack with pre-wired terminals spaced 1.6 inches apart; no additional cables or mounting hardware are required for the listed APC models.

Should I choose the RBC35 or the RBC47 for my APC Back-UPS ES BE350?

Select the RBC35 — it is the specified replacement cartridge for the BE350, BE350C, BE350G, BE350U and related ES 325/350 series units.

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