When the power goes out, scrambling for a flashlight can be frustrating. Light bulbs with backup batteries solve this by providing light even during an outage. These innovative bulbs charge their ...

For those willing to put some elbow grease into it, there is an almost unlimited supply of 18650 lithium ion batteries around for cheap (or free) just waiting to be put into a battery pack of some ...

When I was a teenager, I created my first lightshow by connecting some small incandescent light bulbs in parallel with my speakers. Then, I pushed the bulbs through small holes in the center of ...