As for the battery, I cant explain it to you. Saturday I was at the In-laws house and as they dont speak English, normally I am left to my own devises. I played Civ 5 for more than 6 hours, then after we went home, I was watching the England cricket on it via wifi, then finally played Plants vs Zombies on it and had to turn it off around 2am as it was warning me that the battery was at 10%.
I have learn from running my computer business here in China that, if you correctly "setup" a new battery they last a lot longer. I did what Samsung suggest in their manuals and charged it to full, then played until it turned its self off. After repeating 3 times, It will last a really long time. Let me fully charge it and Ill up load a screen shot later.
Thanks for the help with the cores though!