Wicked Chili 4000mA / 20W Dual USB Car Adapter Universal for Sony, Nokia, LG, HTC, Motorola, Wiko, Huawei, BlackBerry, Samsung, TomTom, mobile phone, tablet, smartphone and Navi (V3.0, 12V / 24V, 2x USB ) (Accessories)
I find the adapter for months with me in the car in operation and had that none of my devices will load faster on another charger than with this adapter in the car.
Therefore, a very clear recommendation from me. Previously, there was always the argument in the car, who may just charge his phone. That's over now thankfully, that can be loaded 2 devices simultaneously.