Thank you both. Yesterday my battery never dropped below 70% and I'm always using it. Even while watching a whole movie on Netflix it didn't budge.
Went to sleep around 5 am and now 1pm I'm at 68%.
I figure since mine is the last post I may as well edit it and continue.
Rec'd the Anker
externally charger Sat morning but didn't put the battery in it until some time late last night. Woke up this morning, battery (ZL9300) appeared to be charged since the indicator went from red to blue but when I placed the battery in my phone, it was only at 77%.
Although this monstrous battery does fit the Anker charger, I can clearly feel it's not a snug fit. Battery feels loose in it. Also, their own battery felt loose but Samsung's OEM battery was seated snugly.
This here is my first full usage before putting the battery in charger. There is no power saving enabled, screen at full brightness, BT on, some 3G but mostly wifi and some gps.