APC APCRBC123 teardown

Inside
2 x 12 V 7 Ah
Wiring
24 V series
List price
not published
Cell size
151 x 65 x 94 mm
Terminal
F2
Evidence on cell count
inferred

What is inside the APCRBC123?

APCRBC123 holds two 12 V blocks wired in series rated 7 Ah, giving a 24 V bus. APC titles it "Smart-UPS Line Interactive, 24V 7Ah". We inferred the count from its voltage and size. Both blocks carry the same current and should be replaced together. Check the label on your old blocks before ordering a replacement.

FRONT ELEVATION: 2 x 12 V, 24 V DC BUSCELL 1tabs F2+−CELL 2tabs F2+−RED TO UPS (+)BLACK TO UPS (−)each cell 151 x 65 x 94 mmPLAN VIEW, TO SCALE: CASE FORMATS151 mm65Standard 7-9 Ah (this page)CSB HR1234WF2, 94 mm case height151 mm51Slim 6 AhCSB HR1224WF2F1, 94 mm case height90 mm705 Ah cubeCSB HR1221WF2, 102 mm case heightFASTON TAB WIDTH, ENLARGEDF1 4.75 mm / 0.187"F2 6.35 mm / 0.250"
Every ledger row for APCRBC123
FieldValueQuoteSource
oem titleAPC Replacement Battery Cartridge for Smart-APC Replacement Battery Cartridge for Smart-UPS Line Interactive, 24V 7Ah lead-acid batteryT1 se.com

Which UPS models use the APCRBC123?

Of the 35 models we track, APCRBC123 fits BR1000G, BX1350M, SMT750RM2UC. 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.

Models on this site that use APCRBC123
UPSRatingSerial condition
BR1000G1000 VA / 600 Wall serials
BX1350M1350 VA / 810 Wall serials
SMT750RM2UC750 VA / 500 Wall serials

Which bare cells replace the APCRBC123?

Replace APCRBC123 with two 12V 9 Ah F2 (same case as 7 Ah) cells and reuse the factory harness. APC lists a 24V 7Ah module. 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.

2 x Mighty Max ML9-12 12V 9Ah F2
Standard AGM, F2. The like-for-like choice.
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2 x CSB HR1234WF2 12V 9Ah High Rate (the high-rate option)
High-rate AGM, F2. Holds up best at UPS discharge rates.
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Can LiFePO4 replace the APCRBC123?

A 12.8 V LiFePO4 pack fits the APCRBC123 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.

2 x 12.8V 10Ah LiFePO4, F1 terminal
Listing claims a 20 A BMS and doesn't say whether that is continuous.
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2 x F1 to F2 terminal adapters, pair (4 adapters needed)
One pair covers one cell.
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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 APCRBC123 cost against bare cells?

We can't state a saving for APCRBC123. We found no published list price for it. A figure here would be invented, so this page leaves it out and points you to the sources we did check. Ask the manufacturer for current pricing.