Quantity   Component name
1 × ESP32-PICO-D4 Espressif SIP
1 × CP2102 Microprocessors, Microcontrollers, DSPs / USB Microcontrollers
1 × NJM2884 Power Management ICs / Linear Voltage Regulators and LDOs
2 × NPN Transistor chip transistor for peripheral
3 × chip LED Lipo charging status indicator and blink test
1 × TP4057 Lipo battery controller
1 × resistors & capacitors