An advanced lithium battery charger and powerbank with a SSD1306 OLED display based on the BQ25896 IC and ATMEGA32U4 MCU.

Please check out one of these posts for more info:
Hackaday
Blogspot
Hackster

You will also find the Gerbers and Pick & Place files I used in the Gerber folder. You can get the latest schematics and generate your own gerbers using the EasyEDA links below.
EasyEDA Main PCB and BOM
EasyEDA OLED PCB and BOM

Check out the Youtube Video for this project: