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Rectangular black sealed battery with two top terminals

BatteryJack inc.

BatteryJack inc. RBC35 WP3-12 12V 3.3Ah UPS Replacement Battery

SKU CH-JRP5-YAKWR

12 V 3.3 Ah AGM battery fits APC RBC35 and RBC47 cartridges plus CyberPower 325, 300 and 320 SL models

  • Maintenance-free AGM design simplifies UPS upkeep
  • 12 V 3.3 Ah capacity powers compatible APC units
  • Fits RBC35, RBC47 and listed CyberPower models
  • Compact 5.28 × 2.64 × 2.4 in footprint saves rack space
  • 6 in terminal spacing matches OEM cartridge layout

Direct replacement for APC RBC35

This 12 V 3.3 Ah sealed lead-acid battery uses advanced AGM technology to deliver maintenance-free operation in a compact 5.28 × 2.64 × 2.4 in form factor. It is built as a 100 % OEM replacement for the APC RBC35 cartridge and compatible CyberPower models.

Upgrade from depleted original cells

The unit fits APC Back-UPS ES models including BE325-FR, BE350, BE350C, BE350ES, BE350G, BE350U and ES 325, plus CyberPower 325SL, CPS300SL, CPS320SL and CPS325SL. Swapping a worn pack restores full runtime when the existing battery no longer holds charge.

Steady output under continuous drain

AGM construction provides stable voltage during extended backup events such as prolonged outages or security-system loads. The maintenance-free design resists capacity fade over the expected 4‑7 year service life, avoiding the voltage sag common with aged conventional cells.

How it compares

Measured against everything we stock in UPS Replacement Batteries, at today’s prices. Recalculated every night.

Price $15.99
Cheaper than about 83% of the 3,915 comparable items (median $39.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Will the 5.28 x 2.64 x 2.4 inch case fit my UPS battery compartment?

The battery measures 5.28 inches long, 2.64 inches wide and 2.4 inches high; compare those dimensions with your UPS battery bay before ordering.

How do I connect the terminals when the posts are 1.6 inches apart?

Align the battery so the positive and negative posts match the UPS connector spacing of 1.6 inches, then press the slide-on connectors firmly until they seat.

After how many years should I plan to replace this 12 V 3.3 Ah AGM unit?

Expected service life is four to seven years; schedule a replacement once runtime drops noticeably or at the five-year mark for critical loads.

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