To fast your BATLOGGER M2 faster, use a USB-C wall plug and the USB-C cable that comes with the device. With this setup you can charge your BATLOGGER M2 with 3A:
If you use a USB-A wall plug and a USB-C to A cable, you can only charge with 0.5A:
The plug must of course be able to deliver enough power, so check that yours has an output of 3A.