You must be fucking annoyed by all my quest questions recently but it just occurred to me, I can't change the battery in the headset, so I need to make sure i'm following optimum battery health procedure in order to avoid damaging its capacity. 

What is that procedure? Should I be topping it up all the time? Should I be letting it go down to single figure percentages before charging it back to full again? I'm not a smart person but i've heard of battery "Memory" and that improper charging can reduce the capacity. 
If someone smarter could let me know i'd appreciate it.