After several attempts and a read here at Amazon review, I have with the Revolt finally found the right solution for me. I've been using in my X3 not BMW Navigation Navigon but with the iPad mini 2 / retina. All car chargers used so far could the iPad while activated navigation and all online connections not load. Now may be the iPad mini perfectly 3-4 hours with the battery navigate, but at some point is just the end. That has now changed. For example, while the already powerful Wicked Chilli Dual 12V / 3100mA use could extend only a little, it creates the Revolt in fact the iPad mini Retina during active navigation incl. Active online connections to load and in addition also an iPhone to. I have already ordered a second me. Excellent! A word about Amazon: Order, execution, delivery - perfect as always.