Mixed review for recharging

I bought this cable to make charging my smartphone in the car, especially when I use my device in GPS mode (with data). Before this purchase, I used a low cost cable. My record is mixed.
* Concerning the low cost: the mouthpiece attaches poorly on the smartphone with fake contact. When it is set, the battery is effective (I do not charge loses, or is less than 5% in one day).
* Concerning the Anker cable: The cable attaches perfectly without faulty contact. However, it does not charge the phone effectively. On 1:30 of conduct, I lost about 10% to 15% charge. So I'm disappointed. It will probably serve me to transfer data from the phone to a PC. But for this purpose, I already had a suitable cable ...