The other day my Internet went down while we were away and I couldn't access my home security system from my Cellphone. When I arrived at home, I found that the battery backup I use to keep my cable modem, wi-fi and security system hardware running during a power outage failed after less than 3 years. Even though that unit was still in warranty, I couldn't find the documentation to verify proof of purchase. I decided to spend a bit more and purchase an APC replacement supply instead of the brand I purchased originally. The APC unit happened to be on sale, so it was only $10 more than an exact replacement, and it is providing me with 25% greater capacity. I've only had it a week now, but it's operating fine. The only issue I have with these supplies is that most of the equipment I need to plug in have oversize power supply boxes making it impossible to use every outlet. Fortunately, I was able to plug in my two wifi routers and cable modem without resorting to a secondary outlet strip, but I lost the use of one of the protected outlets. The security monitor that I would like to have available in case of an outage is plugged into the unprotected side. If the monitor goes down, I can still operate the system via my cell phone app, so the system is still operational. Not ideal, but I preferred that solution to the hassle of adding a second power strip.. I only gave the unit 4 stars because they had the room on the exterior to spread the outlets widely, but chose to group three outlets together and set only one to the side. Had they divided the outlet space equally across the front of the device and relocated the power switch, I might have been able to use all four protected outlets.