Concerns of Battery and Screen PPI?

yea, i just called my buddy with g2, he said he is on his all day for music web browsing youtube, downloading stuff. an he doesnt charge until he goes to sleep. i think this is a good sign. but i will def get a car charger just in case
 
When i bring home the Thunderbolt the first thing I will be buying for it will be an extended battery, not those big bulky ones that make your phone a few inches thicker but the thin one. I bought one for my Incredible and it has let me make it through the day with moderate usage