Have a RazerBlade 15 Advanced (2021) RZ09-0409x using standard charger and battery. Battery charging icon appears when laptop is being charged, however once the battery reaches a full charge, charging icon disappears and computer runs in battery mode (reduced performance), even though battery does not start draining in any way. I purchased a replacement battery however this has made no difference, so returned original battery to system. Battery life is still sound, get 2-3 hours from a full charge so believe the battery is ok. Latest BIOS 2.02 installed.