Question 1

What, if any, differences are there between the rb1280x2a and rb1280x2b cartridges?

Accepted Answer

I talked to CyberPower tech support.  The difference between the Rb1280x2A and RB1280X2B is the cable connector.  The RB1280X2A has a male connector and a female connector on the exit. It actually replaces HR1234W that is in CP1500AVR.  The RB1280X2B has two recessed female connectors.  There is also a RB1280X2 which is just the loose batteries the are in the assemblies listed above.  Hope this helps.

Question 2

Got an F03 code... will this new battery fix it or is my unit defective?

Accepted Answer

See https://www.cyberpowersystems.com/product/ups/cp1500pfclcd/.
Scroll down and click Support tab for contact info and online form.
Click Download tab to get the manual that explains lighted display:

"FAULT: This icon (exclamation point  inside triangle) appears if there is a problem with the UPS. Press the POWER button to turn off the UPS.
F01: Battery Mode or AC/Utility Power Mode Overload fault (Turn on the UPS again.)
F02: Battery Output Short fault (Turn on the UPS again.)
F03: Charger Fault (Contact CyberPower Systems for support.)
F04: Internal Fault (Contact CyberPower Systems for support.)"

Question 3

If I buy these, can I keep them stored to use them later on, or do they expire?

Accepted Answer

All lead-acid batteries have an expiration date that varies very little depending upon use.  Typically there is less than a 6 month difference between no use, and full use, over the lifetime of such batteries.  This is why car batteries are not filled with acid until sold.  The acid eats away at the plates at a fairly constant rate.  The disolved plate matter condenses at the bottom of the battery, when there is a reservoir.  Once the reservoir is filled, the cells short out and become unusable, dead.

Question 4

The batteries in my cp1500pfclcd are 9ah batteries, the description shows 8ah batteries, can you confirm the capacity of these batteries?

Accepted Answer

You are absolutely correct. I have purchased 5 of the CP1500PFCLCD model UPS over the last 4-5 years, and are beginning to need battery replacements. The two batteries are joined in a unique way, and with a unique recessed connector which makes replacements very specific (unless you want to customize and re-wire the battery connections). It's rather disappointing from CyberPower to cheap out this way. Two 8 amp batteries gives 16 amps vs 18 amps with 9A batteries on the DC side of powering the UPS.  Unless you know for sure, you are maxing out 12 .5 amps (1500 watts divided by 120v = 12.5 amps) you'll probably be fine. If you are thinking, my PC has a 1500 watt power supply, so I should get a 1500 watt UPS, it's doubtful your PC is pulling 1500 watts  or 12.5 amps continuously.  If so, your PC's power supply isn't going to last that long IMHO, and you should be looking at a higher rated UPS. Also, we do not know if the internal circuit design of the UPS is capable of outputting 1500 watts with 8A batteries, if so it would not last quite as long, a few seconds to a few minutes less depending on the load (what you have plugged into it).  But yeah, you are right.

CyberPowerRB1280X2B UPS Replacement Battery Cartridge, Maintenance-Free, User Installable, 12V/8Ah

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