The very first thing people see when they purchase something is its looks ad to be honest with all of you the PB Runner 10400mAh is nothing special in that area since FSP followed a very simple design. Now the good news is that when it comes to portable battery packs looks aren’t really important so all of us here care very little about that. In the end it’s the interior that matters most and by using A-grade Samsung cells FSP can guarantee the highest possible battery capacity, shortest recharge times and endurance through time.