APC RBC17 teardown
- Inside
- 1 x 12 V 9 Ah
- Wiring
- 12 V single
- List price
- $103
- Cell size
- 151 x 65 x 94 mm
- Terminal
- F2
- Evidence on cell count
- verified
What is inside the RBC17?
RBC17 holds one 12 V block rated 9 Ah, giving a 12 V bus. APC titles it "Back-UPS, 12V 9Ah". There is no series string to balance, so it is the simplest swap here. Check the label on your old block before ordering a replacement.
| Field | Value | Quote | Source |
|---|---|---|---|
| oem title | APC Replacement Battery Cartridge for Back-U | APC Replacement Battery Cartridge for Back-UPS, 12V 9Ah lead-acid battery | T1 se.com |
| msrp usd | 103 | MSRP$103.00 | T1 shi.com |
| shi compat | for P/N: BE850G2, BE850G2-CP, BE850G2-FR | for P/N: BE850G2, BE850G2-CP, BE850G2-FR | T1 shi.com |
| terminal | F2 | Terminal Type | F2 Faston | T2 partssource.com |
| envelope in | 5.94 x 2.56 x 3.70 | Dimensions | 5.94 x 2.56 x 3.70 in | T2 partssource.com |
Which UPS models use the RBC17?
Of the 35 models we track, RBC17 fits BE850G2, BX850M, BE650G1. 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.
Which bare cells replace the RBC17?
Replace RBC17 with one 12V 9 Ah F2 cell and reuse the factory harness. A reseller lists 150.9 x 65 mm. A reseller confirms the terminal type, so no guesswork is needed. Keep the old harness, because bare cells ship without leads.
Can LiFePO4 replace the RBC17?
A 12.8 V LiFePO4 pack fits the RBC17 bay, but its BMS sets the limit. A 12 A BMS allows about 118 W on this 12 V bus. A single pack has no series balance problem to manage. Measure your real load before you buy.
At the listing's 20 A claim the ceiling is 197 W, and at 12 A it is 118 W. Why that matters.
How much does the RBC17 cost against bare cells?
RBC17 lists at $103. One bare cell costs about $34.94 at a non-Amazon single-unit reference price, a saving of roughly 66%. 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 RBC17 MSRP: $103. Typical Commodity Bare-Cell Band (Non-Amazon Reference): about $34.94 for 1 x CSB HR1234WF2. Reuse your factory wire harness to save about 66% against the OEM cartridge MSRP.