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Rectangular sealed lead-acid battery cartridge, black plastic casing, two internal cells, user-replaceable design

CyberPower

CyberPower RB1290X2E 12V 9Ah UPS replacement battery

SKU CH-HNQH-QVAEV

A sealed lead-acid cartridge containing two 12 V 9 Ah batteries, user-replaceable and leak-proof

  • Product typeBattery
  • DetailsBattery Size: 12 V / 9 Ah Battery Type: Sealed Lead-Acid Bat
  • Product dimensions2.56 in × 11.89 in × 4.13 in
  • Product weight11.46 lb (5.2 kg)
  • Two sealed lead-acid cells provide 12 V 9 Ah backup power
  • Leak-proof casing prevents electrolyte spills inside the UPS
  • User-replaceable cartridge enables tool-free battery swaps
  • Compact 11.89 x 2.56 x 4.13 in form factor fits standard bays
  • 46 lb weight allows single-person handling during maintenance

CyberPower RB1290X2E UPS Replacement Battery

The CyberPower RB1290X2E is a sealed lead-acid replacement cartridge rated at 12 V and 9 Ah. It is designed for users who need to restore runtime to a compatible CyberPower UPS unit. The cartridge contains two batteries housed in a leak-proof casing. It is sold new and ready for installation.

User-replaceable design with leak-proof casing

The cartridge is fully user replaceable, so no specialist tools or technician visit are required. A leak-proof enclosure contains the sealed lead-acid cells, reducing the risk of acid damage to the UPS chassis. One cartridge is supplied in the package, matching the original quantity specified by the manufacturer.

Dimensions and weight for rack or tower mounting

The unit measures 11.89 inches wide, 2.56 inches high and 4.13 inches deep, weighing 11.46 pounds. These proportions suit standard UPS battery bays in both rack and tower form factors. Buyers whose UPS requires a different voltage, capacity or physical footprint will need an alternative cartridge.

How it compares

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

Price $90.99
Pricier than about 74% of the 3,915 comparable items (median $39.99).

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Specifications

Product
Brand nameCyberPower
Model nameRB1290 × 2E
Product typeBattery
Size & build
Product dimensions2.56 in × 11.89 in × 4.13 in
Product weight11.46 lb (5.2 kg)

Questions about this item

How often will the sealed lead-acid cells in the RB1290X2E cartridge need replacing?

Sealed lead-acid batteries typically last three to five years; plan to swap the cartridge when runtime drops noticeably.

What limits continuous output from the 12 V 9 Ah pack during a long outage?

The 9 Ah capacity sets the total energy available, so runtime ends when the stored charge is depleted.

Does the 11.46 lb cartridge generate noticeable heat or noise while the UPS runs all day?

Sealed lead-acid chemistry runs silently and produces only modest warmth during normal float charging.

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