Hey bro. Not a problem at all 
Sorry this is the only one I got, will try get better ones when i can get it from my father. The boost board takes the voltage from the lipo, which can be 4 to 3.3v and boosts it up to a steady 5.1v. The charger board is there to insure a correct charging rate, and also to insure that the battery isn’t discharged below its correct voltage. The USB breakout is there so u can plug a standard USB card reader in. I hope that helps