I took a cross country road trip by myself and dog which took a day and a half.  There was something wrong with my phone charger wires so I wasn't able to fully charge my phone in the car or outlets.  So I was unable to use my phone in the last hours of my trip, since it was completely dead.  Even though I made the trip safely I knew I needed some kind of external battery charger, so I bought this.  I'm very pleased.  It's very sleek and does the job.  The wire fits my Nokia N8 perfectly and works fine with our iPads and iPhones.  I like the red laser but I do have trouble turning on the flash light.  But practice makes perfect so I know that would stay a problem.  I keep it in my car but I can keep it in my pocket since its so sleek and a good size for pockets.  I recommend this.