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've bought four of these over the years (for two different setups), and they've always worked wonderfully. They're quite easy to swap out, and not having to replace the whole UPS is obviously ideal. Will continue to purchase them into the future.

There are different batteries for the CP1500PFCLCD depending on the serial number. Mine uses individual batteries. No problem if you get this one. Just pull the tape off and the batteries come apart. Easy to install. Just take a photo of the wire colors before you start. Might want to mark the new batteries before disconnecting anything so they don't get mixed up with the old ones.

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.

It fit and it works...what more can I say. Knocking some stars off for price and ease of install. Price wise, it cost half the price of the original UPS, which just feels like a lot. I definitely had some struggles with reinstalling the face of the unit once I got the new battery in...the face just didn't want to sit right and slide into place which made me wonder if this battery was just a hair larger than the old battery but I wasn't going to try and remove it to compare.

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.

It seems to work fine and saved my CP1500PFCLCD from being disposed of. However be aware that (a) this model does not support hot swapping of batteries (confirmed with CyberPower support) and (b) it is an EXTREMELY snug fit. Getting the old one out was a little tough and I wrote it off to possible swelling of the batteries. However installing the new one must involve some trick to get it fully seated and the (large heavy duty) wiring routed in a very exact spot, because I’ve never succeeded in getting the front panel to seat properly since installing the new battery. It is working and partially attached but not fully closed, resulting in the front of the UPS being propped up 1/2” off the floor by the front panel that won’t fully close. Since I couldn’t afford to shut it down again at that moment to mess around with reseating then battery I just left it this way for now but it’s obviously less than ideal.

I have two UPSs currently in operation. One 8 years old and one four years old, both running off of their original batteries. The older one finally started complaining about its battery not holding a charge, so I needed to get a new one. This UPS was running my cable modem and firewall, so critical to my network. The other UPS was on my main system and accessory equipment. I decided to give the 4-year old a load test and it failed. Ok, guess I'm getting two new batteries now.CyberPower's battery design is two 12V batteries in series instead of in parallel. Without a lot of work to reconfigure two generic batteries, I just went ahead and bought the appropriate CyberPower units. The two batteries were well packaged and protected from shipping damage. There were no outer boxes, just the original boxes with a UPS sticker slapped on them. No biggie.Installation was quite simple. A single screw to remove in order to slide the front panel off and disconnect the cabling. The older UPS has typical 1/4" spade connectors so it was a little work to disconnect the old battery and connect the new one. The 4-year old has a nonstandard connector making generic replacements more difficult, but making reconnection with approved components a breeze.I'm glad I replaced them when I did because last week the power went out without notice for a couple hours and I could shut my computer, my NAS and firewall down correctly with time to spare. Well worth the investment!