For certain products that come with the 1S and 2S version of the USB Charger (i.e. TinyHawk S, TinyHawk II), please note the following:

There should be larger ports on one side, JST-XH balance connectors with 3 pins, for charging the 2S lipo. Note, that the 2S lipo charges via these balance ports ONLY. 
(* Do NOT connect the smaller PH2.0 power connector for charging, as that is used only for connecting to the drone.)

There should be smaller ports on the other side, PH2.0 power connectors with 2 pins, for charging the 1S lipo.