Trouble binding controller to drone

I've recently purchased a tinyhawk freestyle II rtf kit but lost the drone and bought a new one because i liked it. I have been struggling to connect the included controller(rtf kit) to the drone, in betaflight I see that it registers what input I give it to the drone but once I want to arm the drone or do something outside of betaflight it doesn't respond at all.My second question is it safe to put the included charger into a phone brick and use it like that or do I need a specific charger for it.Thanks in advance, this noobie is very grateful via /r/Multicopter https://ift.tt/31OAi8C