Assume that the future can change based on your actions, so any historical information that you bring along with you from the intervening 25 years may quickly drift out of the new realities history.
Edit: also assume that you can be given a healthy 21-year-old body if you want or take your previous self’s place.
Further, identification will be provided for you if you were not born at that time.
USB-C wasn’t designed until 2014. So yeah you’ll need a charging cable regardless
Even nowadays USB-C devices aren’t the de-facto yet(specially true in 3rd world countries like mine), Mini-B and Micro-C are still fairly common(tho really limited compared to USB-C), so depending on the devices being taken, it might not be that much of a trouble