Sure there are pre-made kits to add a rechargeable battery and USB-C compatibility to Nintendo’s venerable Game Boy Advance, but [HorstBaerbel] thought he could throw together something similar for a ...
Wanting to built a small Li-ion cell into something, I was seeking a safe and simple way to charge it, and came across a plethora of built pcbs that include a micro-USB socket, a charging chip, a ...