DIY This USB-C Rechargeable AA Battery & Stop Buying!

Say goodbye to disposable AA batteries forever! In this step-by-step tutorial, I show you how to build your own 1.5V AA rechargeable battery with modern USB-C charging. Using common components like a 3.7V LiPo, BC547 transistor, and TP4056 module, I created a fully functional, transparent epoxy battery that’s both practical and looks incredibly cool. The BC547 circuit steps down the LiPo voltage from 3.7V to a steady 1.5V output. The TP4056 module safely charges the internal LiPo via any USB-C cable. The transparent epoxy protects the circuit and gives it a unique, professional look. 00:00 - Intro 00:24 - Smaller TP4056 Mod 01:28 - Building Voltage Regulator 02:25 - DIY Rechargeable AA Battery