Ask HN: Best USB mini-projector for power users?

Building a professional services business in Shanghai and everywhere I go for presentations I am offered a legacy laptop with MS PPT. Hate the app. I am becoming proficient with reveal.js; love the slickness and flexibility. I am not mating with most projectors in-country using my Lenovo X2 Carbon on Ubuntu 16.04 and the company HDMI cable. Looking for a flawless recommendation balancing portability, price and ease of use. TIA