ISDT C4 smart battery charger
Charges 4x AA or AAA batteries or 2x Li-Ion 18650 or 22650 cells.
Fancy touchscreen menu with lots of control and plays a happy tune when it turns on (this can be disabled).
Newer C4 EVO version is powered by USB-C connection (USB QC2.0/3.0 and PD for more power) and and has a new screen, different user interface and physical buttons