So it finally happened. The Batteries in my APC SUA3000RM2U finally went bad. I’ve had them for over 5 years so I am happy with there life. I’ve had to replace UPS Battery Cartridges and Packs before when working as a Data Center consultant. It is usually a simple and straight forward task. I would RMA the Battery Cartridge or Pack, if it’s under warranty, and then the manufacturer would send me back a new Battery Cartridge or Pack already filled with new batteries. Hot swap it with the old one and you are done.
However, this time it was my home unit and I don’t have warranty coverage or the extended one(usually purchased by an enterprise). So I went online looking for a Battery Cartridge replacement, $300-400!!!, o my! So I decided to try and replace the batteries themselves rather than the entire Battery Cartridge. I was able to find a pack of 8 batteries for around $83 with free expedite shipping. The following steps were what I did to replace each APC RBC43 battery inside the battery cartridge.
Tools needed, New Batteries, Sharpie, Phillips Screwdriver, Utility knife(was in picture for cutting the new box of batteries open only, haha).