I have not done repeatable measurements, HOWEVER (!), my TV cut off, and because of the way I have it set up, my audio went off, but the audio amp power light was still on and the microHD's light was still on. In my panic, I finally checked my battery voltage and I was below 9.1 volts. I discovered I was only running on my "surge-smoothing" battery (30 each, 1.2VDC 100ma. ni-cads wired in 10 in series for 3 packs in parallel) and the moment I reconnected the main line the TV started its warmup cycle and everything came up working again. Since the green light on the microHD never blinked to red, I assume it held up - even keeping the LNBF on.