BUY TP4054 https://www.utsource.net/itm/p/5323872.html

Description: Li-Ion Battery Charger IC Features: - Constant-Current/Constant-Voltage Operation - Automatic Recharge - Thermal Regulation - Overcharge Protection - Short-Circuit Protection - Reverse Polarity Protection - Automatic Trickle Charge - Automatic Power-Off Application: The TP4054 is a Li-Ion battery charger IC designed for use in portable applications. It is suitable for charging single-cell Li-Ion batteries with a constant current/constant voltage (CC/CV) algorithm. It features automatic recharge, thermal regulation, overcharge protection, short-circuit protection, reverse polarity protection, automatic trickle charge, and automatic power-off. It is available in a SOT23-5 package. (For reference only)