People decide whether to trust you with big things by watching how you return a borrowed charger.

Trust gets assessed from small evidence, because small evidence is the only kind most people ever get to see. Returning something promptly and in the condition you received it tells someone what you are like when nothing is at stake, and they extrapolate from there to situations that matter. Nobody announces the test. They simply notice, and afterwards they either ask you or they do not.

Return whatever you borrowed this week without being reminded, slightly earlier than expected. That one habit does more for your reputation than any assurance you could offer in words.