Boost when you need it
Verified Buyer Reviewed by Jeff the biker from Florida on Thursday, October 13, 2016
It doesn't do what they promise, however, I forget to charge my phone and I ride my bike 20 miles a day. I got very sick and almost died while riding. Your device can be a life saver, even if it only charges the phone 60-80%. I have other chargers that are far worse.