Remove the four rubber pads underneath, and use a PH00 screwdriver to remove the four screws

Use a pry tool at the upper edge opposite the side with the charging port. You can see here the small lip that must be disengaged.

Be careful not to damage the black light-guide film attached to the inner body and on the same edge as the lip.

Nothing on the reverse side, except the protruding base of the pogo-pins.

Orange (U3) - BQ25895 - TI 338 - AYLN - I2C 1cell 5A buck battery charger with high input voltage and 3.1-A boost with HVDCP enabled

Blue (U4) - BQ25895 - TI 338 - AYLN - I2C 1cell 5A buck battery charger with high input voltage and 3.1-A boost with HVDCP enabled

Yellow (U1) - Nuvoton WS51FB9AE - 504HBHA - 8051-based CMOS microcontroller, 16 K bytes flash, 1 K bytes SRAM, UART; I²C, SPI, GPIO, 12-bit ADC, Watchdog Timer, 16-bit PWM channel