With battery-powered operation, built-in speakers and lamps that last for tens of thousands of hours, these portable projectors are perfect for take-anywhere entertainment. You can now buy a projector the size of a Rubik’s Cube or smartphone. But a few years ago the combination of small, high-quality DLP chips and energy-efficient LED lamps made it possible to build projectors the size of a hardback book or even smaller. They used to be massive things, ran hot, were power-hungry and needed a chunky stand or coffee table to sit on – if not a dedicated home cinema room. In case you haven’t noticed, projectors have got a lot smaller.
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