They may be small, but having certain tools and gadgets on your keychain can come in handy when you least expect it. Here are ...

Explore the fascinating process of creating a rechargeable LED keychain light. Witness each intricate step, from assembling materials to the final product, designed for convenience and portability.

The base remains attached to your keychain, carabiner, or backpack zipper, and lets you detach the flashlight easily when you need it. That automatically turns the light on; fitting it back on to ...

[Jay] hacked a Blu-Ray laser diode into a keychain enclosure. He found a heavy brass keychain light from Lowe’s and stuffed the diode and a larger battery inside. The existing batteries weren ...

That's what a smartphone is for, surely. Not quite, thinks Akaso, whose new Keychain camera is small, light, magnetic and captures video in 4K. It's for filming everything anywhere. That means ...