CyberPower RB1290X2E teardown
- Inside
- 2 x 12 V 9 Ah
- Wiring
- 24 V series
- List price
- $129.99
- Cell size
- 151 x 65 x 94 mm
- Terminal
- F2
- Evidence on cell count
- verified
What is inside the RB1290X2E?
RB1290X2E holds two 12 V blocks wired in series rated 9 Ah, giving a 24 V bus. CyberPower publishes the cell count. Both blocks carry the same current and should be replaced together. Check the label on your old blocks before ordering a replacement.
| Field | Value | Quote | Source |
|---|---|---|---|
| cells | 2 | Battery Quantity | 2 | T1 cyberpowersystems.com |
| cell ah | 9 | contains two 12V/9Ah batteries | T1 cyberpowersystems.com |
| envelope mm | null | Battery Size | T1 cyberpowersystems.com |
| msrp usd | 129.99 | MSRP | $129.99 | T1 cyberpowersystems.com |
| terminal | F2 | SPECS: 24V - 2 x 12V 9AH (F2/T2) | T2 walmart.com |
Which UPS models use the RB1290X2E?
Of the 35 models we track, RB1290X2E fits CP1500AVRLCD3. That list comes from the manufacturer's pages, and they sometimes disagree with reseller listings. Where a model splits by serial number, its UPS page shows which prefix takes this cartridge, so check your label before you order.
| UPS | Rating | Serial condition |
|---|---|---|
| CP1500AVRLCD3 | 1500 VA / 900 W | all serials |
Which bare cells replace the RB1290X2E?
Replace RB1290X2E with two 12V 9 Ah F2 cells and reuse the factory harness. CyberPower publishes no size here. The terminal comes from a retailer cross-reference or inference, so check your old cell first. Keep the old harness, because bare cells ship without leads.
Can LiFePO4 replace the RB1290X2E?
A 12.8 V LiFePO4 pack fits the RB1290X2E bay, but its BMS sets the limit. A 12 A BMS allows about 236 W on this 24 V bus. Series packs add volts rather than amps, and they can drift apart on the charger. Measure your real load before you buy.
At the listing's 20 A claim the ceiling is 394 W, and at 12 A it is 236 W. Why that matters.
How much does the RB1290X2E cost against bare cells?
RB1290X2E lists at $129.99. Two bare cells cost about $69.88 at a non-Amazon single-unit reference price, a saving of roughly 46%. The reference is a CSB block at one store, and it is not an Amazon price. Reusing the harness is what makes this work.
Official RB1290X2E MSRP: $129.99. Typical Commodity Bare-Cell Band (Non-Amazon Reference): about $69.88 for 2 x CSB HR1234WF2. Reuse your factory wire harness to save about 46% against the OEM cartridge MSRP.