Power Modules

Compact power modules for powering and charging electronics projects: step down a supply voltage, charge 18650 and other Li-ion cells, or add timed switching to microcontroller and IoT builds.
For battery charging, choose the TP4056 1A charging module with protection (Type-C) or the TP4056 charging and protection module (Micro USB). For voltage conversion, use the LM2596 adjustable buck converter or the AMS1117 3.3V step-down module. The timing delay switch module with dual MOSFET control adds an adjustable timer to a load.
Pair these with 18650 cells from batteries, see charging modules for a dual USB power-bank board, and find the LM317T under voltage regulators.