After trying numerous micro USB cable, I finally fell on the gem. For only 3, I have a cable that corresponds exactly to the pictures and the specifications (1.8m anyway!). All my devices (smartphone and tablet) are well recognized without any connection / disconnection problem both in the car charger into the charger or ordis home. The fine head of the micro-USB socket is well within my smartphone that has a shell that is not the case of branded micro USB cable amazon.
My only regret is that having bought 2 because with the price / quality ratio I should take more!