I got a new iPhone 5S, so I have two questions here. First, should I completely drain the battery or is it okay to charge it, and drain it later? It's on 50% now, and started at about 65% at the store. It hasn't been hooked up to a computer or anything either. Second, I read this: https://discussions.apple.com/message/23436682#23436682 I know this is a rare case, but should I be concerned about this happening to my 5S, and is it remotely likely? Thanks.