RT9528 - I2C Programmable Linear Single Cell Li-Ion Battery Charger with Auto Power-Path Management and USB/AV Switch | Richtek Technology
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2s 5a Bms Charger Pcb Protection Board For 2 Cells 3.7v 18650 Li-ion Lithium Battery - Integrated Circuits - AliExpress
![batteries - Problem Understanding how to use Li-Ion battery charger IC - Electrical Engineering Stack Exchange batteries - Problem Understanding how to use Li-Ion battery charger IC - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/71JRU.png)