i'd take as many military/war documents as i could get and put them in an 128gb ipad in pdf format, powered by a solar powered charger
in the ipad along with all this shyt would be maps of the topography of the lands these battles were fought in and military formations so i could help whatever kingdom win, thus ensuring me a high ranking position where i get to pick any wench to satisfy my tallywacker.
aside from downloading tons of modern pornography (to remind me of a time where women waxed their pussies) i'd also download this before going back in time:
https://itunes.apple.com/us/app/all-wiki-offline-wikipedia/id364878448?mt=8
"Sync once and you'll never need a connection again to have every single article on Wikipedia."
this way, i can look up random shyt like solar eclipses, random events and shyt and then predict them like im some sort of wizard.
i wouldn't show anybody my ipad either. i'd tie that shyt up to my stomach. one person finds out this magic slab is giving me the info they'd either kill me, sabotage me, or break the ipad and then im fukked
edit- i'd also write every one of shakespeares plays, and draw as best i could shyt like the mona lisa, and all of van goghs shyt so i can be given credit.