Just in case ! I will mention this
you should be in close proximity to the batteries and the batteries need to be turned on or the APP cannot connect to the batteries
with batteries turned on and you phone within say 15 feet distance
open Lithionics APP and allow it to search for the batteries
It takes a few minutes the first time you do it
after the APP searches and finds the batteries then you will put in the password
this is how it worked for me (using the owner’s manual for instructions)
then , using the serial number on the actual batteries match it to the serial number on the APP and you can mark the batteries with a sharpie 1,2,3
this way in the future you know which one is which !