I am a little late with my update but I was hoping to charge the Restore with the sun while on a hike or when riding my bike. Unfortunately, I still have not come up with a good way to attach the unit to my bike, and I have not been hiking with a pack yet. Plus, I have only been out a couple of hours each time for my exercise hikes and bike rides. Having said that, I have been using the Restore and it is a pretty neat devise. To read the rest of the update along with the entire review please click here.