An ecoflow battery generator. Granted, it’s a small-ish one but I got this itch to purchase one after seeing one in action while car camping (“I can use my hot water kettle while camping, how cool!”) and when our city was warning us about widespread power outages from an upcoming winter storm (“to keep our devices powered up”).
For water stuck in your ear after shower or swimming, what works for me is tilting your head to the side that is plugged and bending/unbending your knees (making your body bounce) until the water comes out.