There's some sweet spot where technology is relatively easy to improve upon with Wikipedia, but one can also find wires and generators. Some time in the first h

There's some sweet spot where technology is relatively easy to improve upon with Wikipedia, but one can also find wires and generators. Some time in the first half of the 19th century is probably good. It gets easier if you're allowed a solar charger to take with you, then you can improve tech in loads of ways (though probably best to restrict yourself to post enlightenment if you want to keep intact).