Power Supply Unit (PSU)

charger BQ25700A

http://www.ti.com/product/BQ25700A

http://www.ti.com/lit/ds/symlink/bq25700a.pdf

gauge BQ40Z50-R2

http://www.ti.com/product/BQ40Z50-R2

http://www.ti.com/lit/ds/symlink/bq40z50-r2.pdf

Technical Reference & SMBus register documentation http://www.ti.com/lit/ug/sluubk0a/sluubk0a.pdf

external resources

https://github.com/ArminJo/Smart-Battery-Module-Info_For_Arduino