have you tried actually running the pc and everything for 30 min on the battery? I also have a UPS that claims a certain wattage and the one time I tried it, it

have you tried actually running the pc and everything for 30 min on the battery? I also have a UPS that claims a certain wattage and the one time I tried it, it seemed to be losing power very quickly even when I only had my router and modem on it.