Design my own TP4056 Li-Ion Charger and IoT Power Supply Subsystem

This article described how to add the protection circuit to 18650 battery the CORRECT WAY and how I build my own battery charger and an IoT power supply subsystem which consists of a battery charger, a 3.3v/5v boost/buck converter with very low quiescent current. 18650 Battery and Battery Protection One of the common things that [ ]