Worlds smallest USB-C Li-Ion charger I stumbled upon these incredibly tiny USB-C Li-ion chargers on AliExpress and couldn't resist checking them out! These minuscule PCBs, just 10mm x 6mm, feature the LP4054 (or TP4054) linear battery charger. With a 1.65K programming resistor, they offer a charging current of around 600mA. Keep in mind, they can get pretty toasty, reaching up to 92-93C! For fun, I tried recreating them in KiCad and found it surprisingly easy. 16 July 2025