VERTER 5V USB Buck-Boost - 500mA from 3V-5V / 1000ma from 5V-12V [TPS63060] : ID 2190 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Double 18650 Lithium Battery Shield V8 5V/3A 3V/1A Power Bank Battery Charging Module Micro USB For Arduino ESP32 ESP8266 WIFI - AliExpress
18650 LI-Ion Battery Charger and Dual USB 5V 2A Step Up Power Supply M – Envistia Mall
3 USB Output 3V to 5V 2A Lithium Battery Charging Board Mobile With LED Power Bank Charger Controlle Step Up Boost Power Module - AliExpress
power supply - Powering a circuit from either USB or LIPO - Electrical Engineering Stack Exchange
Amazon.com: ICQUANZX XT60 to USB Fast Charging Converter Support 3S-6S Lipo Battery (10.5V-32V Input, 3V-20V Output ) 45W Max Fast Charge Adapter for RC Racing Drone : Toys & Games