All I know is that I have been using the extended 2100mah HTC battery that Verizon stocks (
http://www.verizonwireless.com/b2c/s...hetypeId=11545) and immediately prior to the update I could go two full days and still be over 10% battery remaining with moderate use.
Since updating to 6.5 and with the same extended battery it's no where close. Today I removed it from the charger with 100% charge at 8:40 this morning. Not one single phone call and received 3 text messages and sent one text and by 2:00pm was down to 10%. That is HORRIBLE in my book. The only app I have installed over bone stock is call-calendar which I also used under 6.1. After updating to 6.5 I did a hard reset before getting things back to normal. Very frustrating.