Draining a battery is easy ... a holder for a single 18650 cell, and a rocker switch to connect it all together. But wait, what’s that a TP4056 charging module doing in there?

A China-based firm has launched a novel energy storage device that tackles the 18650-battery power ... pulse discharge capability, battery lifespan, charging speed, and low-temperature performance.

You can salvage lithium 18650 cells from all sorts of modern ... with a pair of addressable WS2812B LED bars to show the battery’s health and charge levels. As an added bonus, if you plug ...

Seeed Studio IoT Button is an inexpensive ESP32-C6 button powered by a rechargeable 18650 battery and designed to easily and quickly control Smart Home ...