Features of the USB-C Micro-Lipo Charger for LiPoly battery : Disclosure: Some of our articles include affiliate links. If you buy something through one of these links, Geeky Gadgets may earn an ...

The power packs [Andy] looked at have a TP4221 controlling the charge cycle for up to four 18650 LiPo cells connected in parallel. The controller also boosts the voltage to 5 volts for one or two ...