Run time depends on what you have plugged into it. I have a few small devices that don't use a whole lot of electricity plugged in and it definitely lasts more than 2 minutes.
However, for me, 2 minutes was exactly what I was hoping for because we have frequent power outages that last a minute or two. I just didn't want to have to reset my DVD clock or have the cable modem and wifi router spend 5 minutes rebooting every time we have a one-minute outage. Works great, and I've had outages over 5 minutes and the UPS covered that no problem. That's better than I expected, so I bought two more (on sale) to cover other devices that I don't want to lose power abruptly during a short outage.