Powering an outdoor 1080p or 4k outdoor projector typically involves using a reliable power source, which can be an electrical outlet, portable power generator, or the projector's built-in rechargeable battery. For example, Nebula Mars 3 mini outdoor projector comes with a 185Wh capacity allowing for about 5 hours of playtime anywhere. Ensure you have the appropriate power cables and adapters for your chosen power source, so that enjoy outdoor movie nights and entertainment without interruptions.