This is MUST OWN product!!  I carry one in my purse and my husband carries one as well.  Not only does it give me peace of mind that I won't be stranded with a dead phone, it works REALLY well!  The size and convenience is unmatched.  I don't know how many times I have let someone use it when their battery is dead and they all want to know where I bought it!  It sells itself!  Great product - one of my faves from New Trent.