Not sure about the features on the WE (I was gonna get one myself but everyone recommends to get an IMAX B6)
I'm assuming you're talking about the model which is about £15?
It's is obviously quite a simple smart charger compared to others - but nonetheless, the main feature is that it should cut off once a battery is fully charged at the very least.
I always charge in the auto setting. Do not use the discharge charge function as I found with my batteries it wasn't putting full charge in them ran out of juice after one game.