Is this pouch tough?Reason for asking is because I have the Swiss charge pouch which works perfectly.It charges my phone 100%,sync's and charger's through micro USB.But this is already pouch number 2 in as little as one month.This pouch is very flimsy and starts cracking by day 3.I am contemplating buying the Mophie but I need to know if this cover is much more durable than the Swiss charger because they look very identical.Pls help.tx