As you can guess from the video below and the layout of components, actually getting to the battery in the Lumia 1020 is extremely tricky - maybe a subject for a future LE55ONS video, for the really, really brave. But it's good to know that effecting a battery 'reset' is trivial, anyway, and this may get someone out of trouble, should the various Windows Phone key combinations not work.
Here's the video, anyway, showing how to open the 1020 and replace the display.
Two other points of note. I was interested to see all the little foam pads, designed to hold some of the innards of the phone in place if the device is dropped - presumably these were added at the late prototype testing stage, in response to failures when connectors popped off. Also, LE55ONS mentions at the end that a factory reset of the device also resets the screen digitiser calibration, so perhaps this information might be useful to someone in the future too?
Great stuff, and his videos are so well done. Subscribe to LE55ONS's channel here.