I prefer an LCD that displays an accurate voltage reading and the charging current. E.g. VP2
The ability to select the charging current is useful for smaller 10440, 14500, 18350 cells. Some chargers automatically select and use an inappropriate charging current for small cells (e.g. 1A).
USB-C to USB-C input for a battery charger would be good. Micro USB is becoming less popular with USB-C. I only have a Micro USB cable to support old power banks and chargers. Most of my devices now use USB-C.