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Black rectangular sealed lead-acid battery cartridge with eight cells, 2.8 by 7.9 by 17.9 inches, 34.8 lbs

CyberPower

CyberPower RB1260X8 12V 5.7Ah 8-battery UPS replacement battery

SKU CH-S77A-MJT5K MPN RB1260X8

Eight sealed lead-acid batteries rated 12 V 5.7 Ah for compatible CyberPower UPS models

  • TypeBattery
  • CompatibilityModels: PR2200RTXL2UAN, PR2200RTXL2UACN, PR3000RTXL2UAN, PR3
  • SpecificationsBattery Size: 12 V / 5.7 Ah Battery Type: Sealed Lead-Acid B
  • Dimensions2.8" x 7.9" x 17.9"
  • Weight34.8 lbs.
  • Restores runtime with eight matched 12 V 5.7 Ah cells
  • Sealed lead-acid design requires no maintenance
  • User-replaceable cartridge fits PR2200 and PR3000 rack/tower UPS models
  • Compact 2.8 x 7.9 x 17.9 in form factor slides into existing bay
  • 8 lb pack delivers reliable backup for critical loads

Replacement Cartridge for PR-Series UPS

The CyberPower RB1260X8 is a sealed lead-acid battery cartridge containing eight 12 V 5.7 Ah cells. It is built as a direct replacement for compatible PR2200 and PR3000 rack-tower UPS units and their matching extended battery packs. Installation is user-replaceable and requires no special tools.

Sustained Discharge Characteristics

Sealed lead-acid chemistry delivers a steady voltage curve during extended outages rather than a brief peak current burst. The 48 V string maintains consistent output across the full discharge cycle, supporting connected loads until the UPS initiates its low-voltage shutdown routine.

48 V String Interface Limits

The cartridge forms a 48 V DC bus that matches the input window of the listed UPS and battery-pack models. Capacity is fixed at 5.7 Ah per cell, so runtime scales only by adding additional BP48V packs; the cartridge itself cannot be expanded or reconfigured for higher voltage or capacity.

Highlights

  • Restores runtime with eight matched 12 V 5.7 Ah cells
  • Sealed lead-acid design requires no maintenance
  • User-replaceable cartridge fits PR2200 and PR3000 rack/tower UPS models
  • Compact 2.8 x 7.9 x 17.9 in form factor slides into existing bay
  • 8 lb pack delivers reliable backup for critical loads

Specifications

BrandCyberPower
ModelRB1260X8
TypeBattery
CompatibilityModels: PR2200RTXL2UAN, PR2200RTXL2UACN, PR3000RTXL2UAN, PR3000RTXL2UACN, PR2200RTXL2UHVAN, PR3000RTXL2UHVAN, BP48VP2U03, BP48VP2U04
UPS Models: PR2200RTXL2UAN, PR2200RTXL2UACN, PR3000RTXL2UAN, PR3000RTXL2UACN, PR2200RTXL2UHVAN, PR3000RTXL2UHVAN, BP48VP2U03, BP48VP2U04
SpecificationsBattery Size: 12 V / 5.7 Ah
Battery Type: Sealed Lead-Acid Battery
Dimensions2.8" x 7.9" x 17.9"
Weight34.8 lbs.
Shipping weight16.60 kg
Package size533 × 267 × 152 mm

Questions about this item

Does the sealed lead-acid cartridge produce noticeable heat or fan noise during continuous UPS operation?

The cartridge itself is a passive sealed lead-acid pack with no fan or active cooling, so it adds no audible noise and only minimal warmth during normal float charging.

Which UPS models must I already own for this eight-battery cartridge to fit and connect correctly?

It is designed for CyberPower PR2200RTXL2UAN, PR2200RTXL2UACN, PR3000RTXL2UAN, PR3000RTXL2UACN, PR2200RTXL2UHVAN, PR3000RTXL2UHVAN, BP48VP2U03 and BP48VP2U04 units.

Will the 12 V 5.7 Ah cells work reliably alongside the older battery strings already installed in my BP48VP2U03 external pack?

Mixing fresh 12 V 5.7 Ah cells with aged strings creates voltage and capacity imbalance, so CyberPower recommends replacing all eight batteries at once rather than blending old and new modules.

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