It's the tail end of 2014 and people still dont understand how lithium ion batteries work?
the mind boggles… 
Charge it often and it's just fine. As a matter of fact the battery prefers that to being depleted and then fully charge.
The fact that it starts charging automatically when you plug it into your laptop or pc should tell you that it's ok to charge it when ever you like.
I've had every iPhone since the 3G and the batteries have lasted for years, and I charge them when ever I feel like it.


Charge it often and it's just fine. As a matter of fact the battery prefers that to being depleted and then fully charge.
The fact that it starts charging automatically when you plug it into your laptop or pc should tell you that it's ok to charge it when ever you like.
I've had every iPhone since the 3G and the batteries have lasted for years, and I charge them when ever I feel like it.