Hot swappable batteries: Most UPS devices do not offer this handy feature

It's a nice feature, but in order to setup the network card you must have a computer with a serial port.

Four external batteries can also be connected, which is another great feature

The Liebert 500VA UPS has a lot of amazing high-end features

It has a great feature set at a very affordable price.

One of my favorite features on this about Liebert is that they're actually activity providing power 24/7

It's built like a tank, and a great feature is that you can connect it to a second battery for much greater capacity