Tripp Lite AVRX550U AVR Series 230V 550VA 300W Ultra-Compact Line-Interactive UPS with USB Port and C13 Outlets, Black

Elevator! Works great.

send it back as it was not appropriate for this market.

Purchased to replace the same unit that had failed after 3 1/2 years-arrived promttley and was as expected. Plugged straight in for an easy direct replacement

I was replacing a similar UPS and really thought that this would be a perfect fit, but the battery life is only 30 minutes. so for a half hour after shutting down my machine, I get to listen to the backup scream, and since all of the packaging is in another language, I was not prepared for that.

I tested the UPS by unplugging its wall socket, the power held up for all the connected appliances and it managed to shutdown the connected computer too after the set time in PowerAlert software (15 sec). The total load was within the 450W limit.I then plugged the wall socket back in, and the UPS came back to normal mode. All was well up till that point.However, after about 30 sec the UPS reset itself, and all the connected appliances lost power for a short time then restarted.I tested this a few times with the same result. This defeats the whole purpose of having a UPS. It only happens if the computer was connected though. Not sure if this is a faulty unit or a design fault, but now I can only use it for non-computer loads, e.g. my router and my small Raspberry Pi.When I tried to return the item, Amazon said the item was not eligible for return due to the Lead Acid content (but then it was sent via a courier to me).Don't buy even if this is just me unfortunate enough to receive a faulty unit, as you can't return it if you are unlucky enough to get one too.