Just got the 2150 Mah battery last night and put it through the wringer today to see how good it was. I've had the phone on now for 10 hours with over 1/2 that time playing internet radio(Over Bluetooth to car radio!!) mixed with web browsing and a couple dozen texts. So far the battery is at 54% left and it looks like I could stream internet radio all day long with this battery and never kill it !! Awesome !! My question is, what the heck took so long for HTC and Verizon to release this thing !!! Two thumbs up on the extended life battery !!!