I don't know what revision/version I have bought since I bought mine in September of 2012, so probably not the latest version being sold.  The one I have has given me no problems to speak of it charged my Inspire 4g while out camping or sleeping out on a boat.  Temps ranging from 30F (super cold for Florida) to temps probably over 100 while down in the Keys.  Has sat in my truck in the summer where temps can easily hit over 120.  Nice compact size and the flashlight while not super bright is sufficient to respond to the call of nature while camping in the woods.  Downside would be it's only 1.0A output which was fine for my Inspire 4g but can't put out enough power for my Oppo Find7a and it's bigger screen so the phone discharges while in use on this battery pack, albeit at a slower rate of course. I didn't take a star off for this because the product clearly states 1A output.  Durability wise it's been dropped and tossed around and aside from some of the wording on the back coming off it's fine.