the way i figure it theres only really 2 choices... keep it plugged in and use it when needed, or let in stay unplugged where my HORRIBLE reception in my house kills my battery and ill have to plug it in over and over again constantly depleting then refilling charge.
On my days off (today ironically) i'm home all day. 24 hours of my reception being on AVERAGE 100 dbm (really bad), thats a lot of battery usage just searching for signal.
hopefully my poor battery is ok haha
If it dies Verizon or HTC will be more than happy to sell you a new one! Use it abuse it a new one is not much money.