My CyberPower UPS has two batteries mounted together and separated by a plastic piece. The whole assembly is held together by a kind of sticky mylar piece that is used to pull the batteries out of the cabinet. It makes a "cartridge". I thought that is what I was getting with this product. I thought I would just have to disconnect the battery cartridge and insert the new one.
This product just came as two batteries. I had to disassemble the old cartridge and wire in these batteries (using the existing cartridge wire). It not a huge deal but they should not advertise this as a replacement cartridge because it is not.
That said, the batteries fit perfectly and work properly. Just be prepared to do a little more work to install them.