My laptop (VOSTRO 3590) charger adapter model number CN-0MGJN9-LOC00 was not functioning due to cable fault hence ordered for same model number charger from DELL. Have received same wattage and pin specification charger but the model number is different i.e.  CN-0MK947-48661. Need to understand what the difference is and would there be any issue for the performance of the laptop. Should i get the exact model number and return the current adapter?