CyberPower RB1280X2B UPS Replacement Battery Cartridge, Maintenance-Free, User Installable, 12V/8Ah

I bought this RB1280X2B replacement battery pack (2-batteries set by CyberPower ready-to-go) to replace a failed battery pack in my old CTS1400S (1400va) UPS. They came when promised, were delivered on-time and properly, were boxed properly and well-secured safe from any damage. They arrived fully charged. The existing battery pack was easy to extract (remove 2-screws from the bottom of the face plate, slide it down about 3/8" of an inch to release the tabs from the slots, and gently pull off) and the new pack was easy to slip in. It was about a 3-min project altogether. The hardest part was removing the power plug from the existing battery pack as it's a nice tight fit.After getting this setup I plugged int he unit and verified it was working, plugged in a very light load and simulated a power failure. I let it draw down to 80% capacity, then plugged it back into utility power to check for charging issues. It passed all tests and is now in service.The tech I spoke to at CyberPower years ago recommended as a rule-of-thumb no more than 3-battery rotations, the original plus two, but in any kind of production environment figure two rotations (original plus one replacement) then replace the UPS. This seems to hold true for us as after the first set of replacement batteries goes out, they charger circuitry is getting pretty beat up.All-in-all the CyberPower replacements have been a good value for us. I can't speak to "aftermarket" types, but it's worth noting the CyberPower-labeled battery pack we received was made by Leoth in China.

I have a CyberPower CP1500PFCLCD, which is one of the models that takes two batteries. I was a little concerned because I had read conflicting things about battery compatibility. As others here have said, these work just fine, you just have to remove some tape and separate them. Getting the new batteries plugged in was way easier than I was expecting as well. The battery backup is back up and running, and for a fraction of the cost of a whole new unit.

OEM Batteries, packaged very well, arrived on time, and were undamaged in any way. Kudos!Replacement was pretty straightforward - unscrew two screws on the bottom of the faceplate, slide the faceplate down toward the bottom of the unit, and lift. The old batteries are easily accessible from that point out - just remove the plate holding one of the batteries, then wrestle (I mean that!) with the wires to take them off, remove old batteries, replace with new ones, reconnect cables, put the retention plate back (2 screws there also), then slide and secure the faceplate, and you’re done! Oh, just make sure to power down and unplug the UPS - no need to get jolted! The batteries I received actually were the upgraded version of what I purchased.Overall, a very uneventful replacement, which is exactly what you want!

Battery delivered on time and is OEM as advertised.The removing the battery plug was PITA but otherwise simple replacement.MAKE SURE you order correct battery for CP1500PFCLCD; there is two different models depending on what your serial number of the CP1500PFCLCD. Below is from Cyberpower's website:CP1500PFCLCDRB1290X2 (for serial numbers beginning with CXX)RB1280X2B (for serial numbers beginning with CR9, CXF, or CQC)

After using UPS products from multiple manufacturers, CyberPower UPS are the best I've used. Also, the batteries come with a CyberPower certified label, meaning they're OEM or at the very least approved by CyberPower. But the reason for this review is to point out that the description for this item states that it's compatible with model CP1500PFCLCD. It's true, but incomplete. According to CyberPower Systems specs for this model, this battery (RB1280X2B) should be used for units with a serial numbers beginning with CR9, CXF, or CQC. For CP1500PFCLCD units with a serial number starting with CXX, owners should buy Battery Cartridge RB1290X2 instead. This information can be confirmed at CyberPower Systems website. It could be the reason why some reviews say it was somewhat complex to install the new batteries. They must be compatible (same specs) but not exactly the same. Model RB1280X2B comes with the two batteries connected to each other, which would require them to be disconnected before being installed to a "CXX" CP1500PFCLCD unit, while RB1290X2 comes with two separate batteries. So double check your CP1500PFCLCD serial number before buying this Batteries.

These batteries keep me safe! I have my home office computer on the UPS and the old batteries lasted over five years without a single hiccup. These are the exact batteries for replacement and so far they are just as good. Thanks for having them available! I have only one computer on a UPS. It's good to have that one computer on a reliable system.

As an IT manager, I have replaced more UPS batteries than I can count. This one does work as advertised. However, it takes more effort than similar APC models I have used where you literally just lay the UPS on its side, remove the cover, slide the old battery out and slide the new battery in, replacing the cover last. I do not even shut off the unit. No tools necessary.This one requires the removal of screws and powering down the UPS. Granted, this is as much about the design of the UPS as the battery, but they work together. Tucking all of the wires back in where they belong is important.

Easily replaced the old batteries in my UPS. System is up and running. Didn't know what I was doing and it only took 15 minutes.