Let’s face it, batteries in general are a real drag. They’re easy to forget, add weight to an already heavy gear bag, and they have the habit of running out of juice just when we need them the most. Luckily, a team of engineers from Columbia University have discovered a way to eliminate the need for them to power a digital camera. In a report released by the team, which is led by Shree K. Nayar, the engineers have found a way to harvest energy via an image sensor and excess light.[Read More…]