Welcome, Icicle, and best of luck! As quasimod said, take it as it comes. It is incredibly exciting to start
vaping and to think it is going to be the magic bullet. And it might be, but it take some time too, so be patient and enjoy the vaping!
The PCC is a Li-ion battery in of itself, and thus probably has at least 200 charges in it before its capacity to charge 4 reg batts falls off. It won't be all at once, most likely, but will taper off. By then, you may be into a larger batt mod anyway, and have the PCC in storage. Vaping often goes that direction.