To power Christmas lights without an outlet, you can use batteries, solar panels, or even hand crank generators. These methods provide a reliable source of electricity for your holiday decorations. Solar panels are a popular choice for outdoor displays, as they generate energy from the sun's rays. Batteries are a good option for indoor lights, but make sure you have enough to last the entire holiday season. Hand crank generators are a great way to get everyone involved in decorating, and they're a fun way to keep your lights shining bright!