Its true that if you totally drain a li-ion battery it will damage it. But you can't do that with the iPhone. When it dies from low batt it actually still has quite a bit of charge left, this is kept in reserve to prevent damage.
Here is the official apple advice;
https://www.apple.com/uk/batteries/iphone.html
In short, charge it whenever you like and use it.
Cool thanks for the link!
Don't know about the rest of you but I'm getting excited just thinking about my new shiny iphone and these week is going to be horrible.
Received my spigeon case yesterday and it turned out to be a bumper not a case. Looks like I made a mistake so will be sending it back I ended up ordering another one so should arrive to day
Here it is
Image
I bought the same thing! and should arrive tomorrow for me