2-bay Universal Cylindrical Lithium Battery charger for 18650,16340,21700,etc.

Certification: CE, FCC,UL certificated  Suitable for 18650, 21700,26650, 22650, 18490, 16340 (RCR123), 14500, 10440 etc.  If the charger power LED indicator is off or flickering, please check whether the cable connection is still good  Connect the charger with a mini USB & Type C  Probably the USB cable plugs failed, change a new USB cable to try again