Devotees of secondhand panels tout their low price and the environmental benefits of keeping them in rotation longer.

Bay was once on top—until PayPal split, revenue halved, and investors fled. Many assumed eBay was dead. But behind the scenes ...

A battery is a device that stores energy in chemical form and can convert it into electric energy through electrochemical reactions. Polymer electrolytes are promising but are limited by narrow ...

Gesture-based RC car controller using ESP32-S3, BLE, LSM6DSO IMU, OLED display, and LiPo battery with USB-C charging.