If the charger is certified by Apple as MagSafe it should wirelessly charge at 15W. If it is merely “MagSafe compatible”, ...

With its own built-in USB-C cable the Anker Zolo power bank offers fast speed and comfortable portable convenience.

Charging is limited to 7.5W in such cases. 4. If your charger has more than one port, like the 35W Dual USB-C Port Power ...