CyberPower RB0690X2 teardown

Inside: 2 x 6 V 8 Ah
Wiring: 12 V, 2 x 6 V series
List price: $110
Cell size: 151 x 36 x 98 mm
Terminal: F2
Evidence on cell count: verified

What is inside the RB0690X2?

RB0690X2 holds two 6 V cells in series rated 8 Ah, giving a 12 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.

Every ledger row for RB0690X2
Field	Value	Quote	Source
cells	2	Battery Quantity \| 2	T1 cyberpowersystems.com
cell ah	8	Battery Size \| 6 V / 8 Ah	T1 cyberpowersystems.com
envelope mm	207 x 35 x 225	(mm) \| 207 x 35 x 225 (mm)	T1 cyberpowersystems.com
msrp usd	110	MSRP \| $110	T1 cyberpowersystems.com

Which UPS models use the RB0690X2?

Of the 35 models we track, RB0690X2 fits OR700LCDRM1U. 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 RB0690X2
UPS	Rating	Serial condition
OR700LCDRM1U	700 VA / 400 W	all serials

Which bare cells replace the RB0690X2?

Replace RB0690X2 with two 6V 9 Ah F2 cells and reuse the factory harness. CyberPower lists 207 x 35 x 225 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.

Mighty Max 6V 9Ah F2, pack of 2

Two 6 V cells for RB0690X2. Never a 12 V battery.

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Can LiFePO4 replace the RB0690X2?

We can't recommend LiFePO4 for RB0690X2. The 12.8 V LiFePO4 pack we checked is a 12 V block. It neither fits this 35 mm tray nor suits a 6 V cell position. 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.

High-voltage and thermal safety

UPS battery bays carry high-current DC, up to about 60 A at full load on these models and more at cutoff. Inverter capacitors inside the case can stay charged after unplugging, so never open a unit beyond its battery door. A shorted or mismatched pack can overheat or start a fire. The manufacturers sell only sealed lead-acid replacement packs (APCRBC, RB, RBC) for these units, and we found no OEM approval for LiFePO4. BMS trip limits, series balance drift and 0 V lockout on 24 V drop-ins are modeled from published BMS current ratings, not from UL or OEM certification, and no qualified engineer has reviewed them. Figures are estimates, so check your own unit's label and manual.

How much does the RB0690X2 cost against bare cells?

We can't state a saving for RB0690X2. We have no sourced price for a verified bare cell that fits. 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.