Clip it on your backpack and always have a charge love this i purchased for our family of 4 each their own portable charger for when spending the day out or on trips so my reviews may be similar but will have its own differences and experiences noted

I have only lightly tested it with charging a portable charger a galaxy note 4 note 7 s3 the solar power is only for topping off the charger after its been charged so dont expect to recharge it from pure sun its possible but it will take days and very good sun

I am happy i puchased this because i know it will come in handy as a backup when your out on the beach or the park or anywhere in the outdoors yeah even traffic

I need to charge it maby once a week and i dont use my wall charger enymore