charger great, attention to cable

I first bought a charger other than this one (though not the first price on amazon) and I became disillusioned life: my phone began to do anything during charging, a sign of poor supply. So I decided to buy the original charger and I have no regrets: it is indeed consistent with that came with my device (Nexus 5) and works perfectly. The price difference was worth ...
In contrast, regarding the cable, it is not the same as the original one. It works perfectly but unfortunately the micro USB end is much too big. Having a protective shell on my phone, the cable does not fit. I can exchange it with someone with no shell.