To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.
Been using 2 of these since Jan. Been working fine. No more dead batteries. One problem--comes with suction cups so jammed into a bag that they are bent up and won't stick. Heated them to ~ 200F, then stuck them to a flat surface. Used those that stayed stuck to attach to solar panel. Eventually most worked. Other problem--cord a little short, but works.