Portable Power Station 120W, Power Bank with AC Outlet, Portable Generator 97.6Wh External Battery Power Pack with USB C Input for Camping Home Van Life Adventure Backup

Most rotisserie motors pull very little power. Almost any small power bank will likely run it for hours. Something like this should suffice. https://a.co/d/0h3NLiuO If you already have battery powered tools (Ryobi, Makita, etc), you can find inverters that run off of those batteries. I think that’s a better route than trying to find a battery powered rotisserie motor.