How do i make a portable ac electric generator?
It’s called an inverter. There’s a battery inside, and some circuitry that converts the DC battery voltage into 120-volt 60-cycle AC. Designing an efficient inverter with appropriate protection isn’t the easiest task in the world, but fortunately you can find inverters of varying sizes (wattage ratings) at many hardware and department stores (in the electronics section). These are usually intended to hook into a cigarette-lighter plug, but you could replace this with a battery if you wanted something truly portable.