USB - C PD is the reason I didn't include battery life in this list — occasional needs for extended battery life can be achieved with inexpensive USB - C PD batteries. (marco.org)
For participants who were still married, the questionnaire included a battery of questions that social psychologists use to assess relationships. (sciencemag.org)
That also includes a battery for longer time away from the outlet or charging pad. (slashgear.com)