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Two black sealed lead-acid battery blocks in a cartridge, 12V 8Ah each

CyberPower

CyberPower RB1280X2A UPS Replacement Battery Cartridge 12V 8Ah 2-Pack

SKU CH-MFWP-78FPB MPN RB1280X2A

Two 12 V 8 Ah sealed lead-acid batteries restore runtime to compatible CyberPower UPS units

  • Product typeBattery Unit
  • Compatible withCyberPower UPS: CP1500AVRT CP1500AVRLCD
  • DetailsBattery Type: Sealed Lead-Acid Battery Size: 12 V/8AH User R
  • Key featuresCertified OEM replacement for CyberPower UPS Restores UPS pe
  • Product dimensions2.56 in × 7.87 in × 5.91 in (H × W × D)
  • Product weight12.04 lb (5.46 kg)
  • Restores UPS runtime with certified 12 V 8 Ah sealed lead-acid cells
  • Two pre-assembled cartridges install without tools in compatible CyberPower units
  • Leak-proof maintenance-free chemistry keeps backup power ready when mains fail
  • Reusable packaging simplifies responsible recycling of expired batteries
  • Fits CP1500AVRT and CP1500AVRLCD models for direct OEM replacement

Certified OEM Replacement

The CyberPower RB1280X2A is a certified replacement battery cartridge designed for CP1500AVRT and CP1500AVRLCD UPS systems. It contains two pre-assembled 12V 8Ah sealed lead-acid batteries that restore original runtime performance. The user-replaceable cartridge allows straightforward installation without professional assistance. This kit targets owners of compatible CyberPower UPS units whose internal batteries have degraded.

Thermals Noise and Power Draw

Sealed lead-acid chemistry operates silently with no moving parts or active cooling requirements. The maintenance-free design eliminates the need for fluid checks or ventilation management during normal operation. Leak-proof construction prevents electrolyte release regardless of orientation or temperature fluctuations. Power delivery remains stable through the controlled chemical reaction inherent to this battery type.

Compatibility Decides Fit

This cartridge fits only the CP1500AVRT and CP1500AVRLCD models listed in the specifications. Builders with different UPS brands or CyberPower models outside this pair cannot use the RB1280X2A. The pre-wired two-battery configuration matches the exact electrical and physical requirements of the supported units. Buyers must verify their UPS model number before purchase.

How it compares

Measured against everything we stock in Uninterruptible Power Supplies (UPS), at today’s prices. Recalculated every night.

Price $87.99
Cheaper than about 92% of the 1,153 comparable items (median $948.99).

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Specifications

Product
Brand nameCyberPower
Model nameRB1280 × 2
Product typeBattery Unit
Size & build
Product dimensions2.56 in × 7.87 in × 5.91 in (H × W × D)
Product weight12.04 lb (5.46 kg)
Shipping weight5.90 kg
Package size305 × 251 × 86 mm
Compatibility
Compatible withCyberPower UPS:
CP1500AVRT
CP1500AVRLCD

Questions about this item

How do I install the RB1280X2A cartridge in my CP1500AVRLCD, and what step do people miss?

Power off and unplug the UPS, open the battery door, disconnect the old cartridge, slide in the pre-assembled 12 V 8 Ah pair, reconnect the leads exactly as they were, close the door, then power on and let the UPS charge for several hours before relying on backup runtime.

What maintenance or replacement will the RB1280X2A need later?

The sealed lead-acid cells are maintenance-free; plan to replace the cartridge again when runtime drops noticeably, typically after three to five years, and use the reusable packaging to return the expired units to a recycling centre.

What limit appears first during a long outage on the CP1500AVRT with this cartridge?

The 12 V 8 Ah capacity determines how long the UPS can supply its rated load; once the stored energy is depleted the UPS will shut down, so the runtime limit is reached before any thermal or cycle limit.

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