14. What power supply adapter is suggested to charge the M15S?

Fast charging protocols including QC2.0/3.0/4.0 and PD2.0/3.0 are supported. If the power adapter supports either the above protocol, it can trigger the fast charging function

If the power adapter does not support neither the above protocol, it will not trigger the fast charging function but just common charging.

For non-fast charging adapters, it is suggested to use the 5V 1A/2A power adapters.