Good, but what does some of this mean?

I just got this, and it looks great, (like the iOS design) and it seems like it might help me understand my battery more! But one small improvment would be to explain what some of these things are used for and what i should do? Like the “capacity”, should I charge it until it’s to that percentage? What are the “cycles”? And why is there a n/a to the health? If these are already there, i’m sorry. ‘;) But otherwise, it’s great! 5 stars are worth it!

snikson about Battery Monitor: Health, Info