A battery-free sticker reads vitamin C levels from fingertip sweat by turning any drinking cup into a smart health sensor.

These smart devices are subscription-free, easily movable and can fit right into a renter's life when you're looking for ...

If you’d like to fix or even diagnose anything involving electricity – whether it’s the energy that surges through a car, snowmobile, boat or even a wall socket or a random AAA remote control battery ...