CyberPower OR700LCDRM1U battery teardown

Bare cells needed
2 x 6 V 8 Ah
Max DC draw
40.7 A
OEM cartridge
RB0690X2
Cell size
151 x 36 x 98 mm
In inches
5.94 x 1.42 x 3.86 in
Terminal
F2 check yours
Rating
700 VA / 400 W
Topology
Line Interactive
Waveform
Simulated / Stepped
Transfer time
8 ms typical
OEM list price
$110
DC bus
12 V
Last verified
2026-11-01
LiFePO4 at full load
RED

What battery does the OR700LCDRM1U actually use?

The OR700LCDRM1U uses RB0690X2, which holds two 6 V cells in series rated 8 Ah on a 12 V DC bus. It fits a 151 x 36 mm bay with F2 terminals. This model has no serial-number split that we could find.

Specs and where each one comes from. T1 is the manufacturer, T2 is a teardown or industrial cross-reference.
SpecValueSource
VA and watts700 VA / 400 WT1 cyberpowersystems.com
TopologyLine InteractiveT1 cyberpowersystems.com
Waveform, in the OEM's wordsSimulated Sine WaveT1 cyberpowersystems.com
Transfer time8 ms typicalT1 cyberpowersystems.com
OEM cartridgeRB0690X2T1 cyberpowersystems.com
OEM list price$110T1 cyberpowersystems.com

CyberPower lists 207 x 35 x 225 mm for the pack, and a compatible 6 V cell measures 5.94 x 1.42 x 3.86 in. CyberPower rates this 6V 8Ah despite the "90" in its name. Resellers often say 9 Ah. Full RB0690X2 teardown

PLAN VIEW, TO SCALE: CASE FORMATS151 mm65Standard 7-9 AhCSB HR1234WF2, 94 mm case height151 mm366 V 1U rack cell (this page)Mighty Max 6V, 98 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"

How many DC amps does the OR700LCDRM1U pull?

At its full 400 W rating, the OR700LCDRM1U pulls about 40.7 A from its 12 V bus, and about 46.5 A as the battery sags to 10.5 V cutoff. Those figures assume 82% inverter efficiency, because CyberPower doesn't publish one for battery mode.

DC current by AC load, on the 12 V bus and at 10.5 V cutoff
AC loadNominalAt cutoff
25 W2.5 A2.9 A
60 W6.1 A7.0 A
100 W10.2 A11.6 A
200 W20.3 A23.2 A
300 W30.5 A34.8 A
400 W40.7 A46.5 A

Is LiFePO4 safe in the OR700LCDRM1U?

A 12 A BMS limits the OR700LCDRM1U to about 118 W, well below its 400 W rating. At full load the verdict is RED. We could not verify a LiFePO4 pack that fits this bay and harness, so we link none. Drag the slider below to test your own load.

6 V vs 12 V rackmount trap: this 1U pack uses two 6 V cells in series, about 35 mm thick. A 12 V battery is too wide for the tray and would double the pack voltage. Never fit one.

25 WBMS ceiling 118 W400 W

RED: BMS trip hazard

DC draw now
20.3 A
At 10.5 V cutoff
23.2 A
Safe AC load
118 W
Stock 8 Ah AGM11 min
Upgraded cellnone verified for this bay
LiFePO4no verified pack fits this bay

OR700LCDRM1U: lead-acid anchored to OEM half and full-load runtimes, LiFePO4 on a flat energy curve with inverter tare, at 82% inverter efficiency. A real inrush can trip a BMS below this ceiling. RB0690X2 teardown.

Maximum safe AC load by BMS continuous rating, on the 12 V bus
BMS continuousSafe AC loadShare of 400 W
10 A98 W25%
12 A118 W30%
15 A148 W37%
20 A197 W49%

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. So we show no drop-in link.

How long will the OR700LCDRM1U run on each battery?

CyberPower publishes about 11 min at 200 W and 3 min at 400 W on the stock cells, and our curve passes through both points. We found no larger cell verified for this bay. Drag the slider for your own load.

Estimated runtime in the three options, with a 12 A BMS for LiFePO4
AC loadStock 8 AhUpgraded cellLiFePO4 10 Ah
25 W2.1 hrnone verifiedno verified pack
60 W46 minnone verifiedno verified pack
100 W25 minnone verifiedno verified pack
200 W11 minnone verifiedno verified pack
300 W5.1 minnone verifiedno verified pack
400 W3.0 minnone verifiedno verified pack
CyberPower's published runtime against raw Peukert and this site's calibrated curve
LoadCyberPower publishedRaw PeukertThis siteSource
200 W11 min12 min11 minT1 cyberpowersystems.com
400 W3 min5.1 min3 minT1 cyberpowersystems.com

Upgraded AGM scales from the anchored curve, with k = 1.18 standard and 1.12 high-rate. LiFePO4 uses a flat energy curve with inverter tare. Method.

Which replacement should you buy for the OR700LCDRM1U?

There are three routes for the OR700LCDRM1U. Path A swaps in two bare cells and reuses your harness. Path B is withheld, because no verified pack fits. Path C replaces the whole UPS, which makes most sense for units over six years old.

The three routes compared
PathBest forLoad limitMain risk
A: bare SLA swapLowest cost, any load400 WTerminal or case mismatch
B: drop-in LiFePO4Light loads, long lifenot offeredBMS trip, charger mismatch
C: native LiFePO4 UPSA unit over 6 years old, or high loads800 WSlower transfer than this UPS

Path A: the bare-cell SLA swap

Surge-safe, because AGM has no BMS to trip.

Mighty Max 6V 9Ah F2, pack of 2
Two 6 V cells for RB0690X2. Never a 12 V battery.
Check Prime Price & Stock on Amazon →
2 x Mighty Max ML7-12F2 12V 7Ah F2 (like-for-like)
Like-for-like 7 Ah, F2.
Check Prime Price & Stock on Amazon →

Path B: drop-in LiFePO4

Path C: a native LiFePO4 UPS

Worth it if this UPS is 6 or more years old, if a fault above isn't a battery problem, or if you need more than the BMS limit. Listings and reviews put Goldenmate's transfer at 8 to 20 ms, against this unit's 8 ms typical, so check that your PC tolerates it.

Goldenmate 1000VA/800W LiFePO4 UPS
Built-in LiFePO4. Check its transfer time against your PC.
Check Prime Price & Stock on Amazon →
EcoFlow DELTA 3 Plus
Listing claims 10 ms switch-over. A power station, not a tower UPS.
Check Prime Price & Stock on Amazon →

How do you move the OR700LCDRM1U harness to bare cells?

You move the factory jumper and leads from the old blocks to the new ones, in the same polarity. Unplug the UPS first, and tape each lead as it comes off, because the battery stays live. Sealed sleds must be opened first. No soldering is needed.

FRONT ELEVATION: 2 x 6 V, 12 V DC BUSCELL 1tabs F2+−CELL 2tabs F2+−RED TO UPS (+)BLACK TO UPS (−)each cell 151 x 36 x 98 mm
  1. Shut down the load, turn the UPS off and unplug it from the wall.
  2. Take a photo of the wiring. Open the battery door or sled and slide the pack out.
  3. Pull the red clip off the positive tab, and tape it straight away.
  4. Remove the black lead and tape it.
  5. Check the new cell has the right size and tabs, then add any adapters from the parts list.
  6. Fit the leads one at a time, matching your photo, and remove the tape only from the lead you are fitting.
  7. Slide it back, plug in and charge for the time the manual gives before relying on it.
  8. Recycle the old cell at a battery retailer. Never bin lead-acid.

Sixty seconds is the best case for a loose-cell unit. Sealed sleds need opening first, and opening them may affect your warranty and CyberPower's equipment guarantee.

How much do you save over the RB0690X2?

We can't state a saving for RB0690X2, because we have no sourced price for a verified bare cell. Any figure here would be a guess, so this page leaves it out rather than estimating one for you. Compare the list price with your own quote.

What we have
ItemStatus
RB0690X2 list price$110
Verified bare-cell referencenone

What do the OR700LCDRM1U alarms and fault codes mean?

CyberPower OR700LCDRM1U user manual lists 1 signals we track for the OR700LCDRM1U. Only 0 of them point to the battery, and 1 mean you should not buy batteries yet. Read your signal below first, because a new battery won't fix a charger, a relay or an overload.

The text we captured documents an overload alarm and no numeric codes.

OR700LCDRM1U: signals and what to do. Source: CyberPower OR700LCDRM1U user manual.
SignalMeaningWhat to doBattery swap?Source
Overload alarmOverloadTurn the UPS off and unplug something. A new battery won't help.Do not buy batteriesT1 manual

How do you reach the battery in the OR700LCDRM1U?

On the OR700LCDRM1U, the manual says: faceplate off, then three screws on the cable cover. Inside there are two batteries of about 151 x 36 mm. Check the details below before you start, turn the unit off and unplug it first, and photograph the wiring so you can match it later.

Physical access for the OR700LCDRM1U, from the OEM manual where stated
FieldValueSource
Battery door accessFaceplate off, then three screws on the cable coverT1 manual
Cell orientationNot stated in the manual we capturedsame manual
Harness connector typeBlack and red cable, then a retaining screw on the cable connectorssame manual
Cell layout2 x 6 V, in seriesverified