Agreed. 22.5w fast charge and 15w fast charge are OK. Although many chargers do not overcharge, there is a problem of insufficient charging, which is directly reflected in the short battery discharge time, that is, the short standby call time of the mobile phone.
In the use of the original random new battery users can compare the approximate reference time provided on the manual, to be compared, if the reference value and the actual use of the obvious gap, there is reason to suspect the charger problem, of course, does not rule out the battery quality.