How did you check the amp draw?ok just checked the Amp draw, combined they need 2.5A and this only puts out 1amp. Returning... it can't power them both even though it has a splitter.
If you checked the specs on the adapters that is only the maximum specs it does not mean the device will draw that amount.
Also if it struggles to power on both devices simultaneously when you switch on the ups. Then you plug in one device first and let it power/boot up then plug in the second device. I had to do it with a friends one and both devices stays on when powered with the ups.
