Once in a while, specs don’t tell the whole story. Take the LG PH450U projector. It’s a 720p DLP projector that costs $650, which sounds archaic and overpriced in this age of itty-bitty laser projectors. But the PH450U is actually pretty cool. For one thing, it’s travel-friendly: The little box weighs just 2.4 pounds. You also don’t need to be anywhere near a power outlet to use it because it runs on batteries. According to LG, it’ll give you two-and-a-half hours of showtime per charge.