Just got my S4 last night. A few questions for you guys. 1) Do you guys charge all the way to 100%? Do you charge overnight? I did this with my iPhone, but now I'm reading stuff about the Lithium Ion batteries preferring to not be charged to 100%, and not to charge them overnight, etc. I guess Belkin sells some plug that can stop charging after 2 hours, but I'd assume the phone is smart enough to stop itself from charging when at 100%? 2) The charging cable is just USB to microUSB correct? I'd like to order another one for my work (to charge w/ the PC) and for my car (to charge with my USB car charger). Is it USB 2.0? 3) Would anyone recommend a place for spare batteries? I see some on Samsung's website for $40 (though we get 50% off our first purchase, I believe). Thanks!