Summary: The BE550 has only 1 wide plug for surg and battery. Design problem because routers, DSL modem and others all have wide plug adapters. Product does not address current network equipment design.
No schematic nor Replacement parts for any APC pro
13 December 2012
Summary: I had to buy this because a fuse vaporized when the recharging transformer blew open. Shame on APC for being so stingey to return the favor I will be not be buying a part from them but from digikey or futurlec.
Excerpt: Got this to backup our on demand water heater just in time for hurricane Irene. Didn't work immediately, but realized that I had to turn it on again. Apparently it goes off automatically for some reason. Once I turned it on, it worked just fine and we were able to have hot showers during our 3 day power outage.
Pros: Compact Size, Durable Construction, Green Friendly