dummy batteries for Sony a6300 - time lapse recording

...i think my time-lapse requirements are going to need an intervalometer (maybe Hahnel?) - the Sony 'app' neither allows enough frames to be recorded no a sufficient time interval. This of course plugs into the USB port - preventing a PSU being attached there. But i could go the 'db' route. Ideally i'd like to record for three weeks at the fairly leisurely rate of 1 photo every 10 mins. I don't think lack of power will be a problem - even get a PSU made up is OK. Does anyone know if a Sony a6300 will run like this for three weeks?