CyberPower RB1290X4F teardown
- Inside
- 4 x 12 V 9 Ah
- Wiring
- 48 V series
- List price
- $352
- Cell size
- 151 x 65 x 94 mm
- Terminal
- F2
- Evidence on cell count
- verified
What is inside the RB1290X4F?
RB1290X4F holds four 12 V blocks wired in series rated 9 Ah, giving a 48 V bus. CyberPower publishes the cell count. All the 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 | 4 | Battery Quantity | 4 | T1 cyberpowersystems.com |
| cell ah | 9 | Battery Size | 12 V / 9 Ah | T1 cyberpowersystems.com |
| envelope mm | 205 x 66 x 316 | (mm) | 205 x 66 x 316 (mm) | T1 cyberpowersystems.com |
| msrp usd | 352 | RB1290X4F | $ 352.00 | T1 cyberpowersystems.com |
| bus v | 48 | BP48V75ART2U | T1 cyberpowersystems.com |
| terminal | F2 | The F2 terminal ensures a snug fit | T2 replaceupsbattery.com |
Which UPS models use the RB1290X4F?
Of the 43 models we track, RB1290X4F fits PR1500LCDRTXL2U, PR2200LCDRT2U. 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 |
|---|---|---|
| PR1500LCDRTXL2U | 1500 VA / 1500 W | all serials |
| PR2200LCDRT2U | 2150 VA / 1980 W | all serials |
Which bare cells replace the RB1290X4F?
Replace RB1290X4F with four 12V 9 Ah F2 cells and reuse the factory harness. CyberPower lists 205 x 66 x 316 mm for the pack. 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 RB1290X4F?
We can't recommend LiFePO4 for RB1290X4F. Four independent BMS boards in one 48 V series string multiply the balance risk. Showing a link would mean guessing about fit. Buy the lead-acid cell or a factory LiFePO4 UPS instead, and see our method page for how we test fit.
How much does the RB1290X4F cost against bare cells?
RB1290X4F lists at $352. Four bare cells cost about $139.76 at a non-Amazon single-unit reference price, a saving of roughly 60%. The reference is a premium CSB block at one store, and it is not an Amazon price. Reusing the harness is what makes this work.
Official RB1290X4F MSRP: $352. Typical Commodity Bare-Cell Band (Non-Amazon Reference): about $139.76 for 4 x CSB HR1234WF2. Reuse your factory wire harness to save about 60% against the OEM cartridge MSRP.