Charge for goods in warranty

Good morning.<br> <br> I have recently booked in a Samsung P5220 on the 14/01/2015 for a charging fault. Yesterday I received a SMS saying that there will be an out of warranty charge for the repair as the battery is faulty. <br> <br> As it was explained to me it that all the accessories and external extras carry a 6 month warranty, and that is fine, but the tablet is a solid unit and that has a 2 year warranty with MTN, it works the same policy as their mobile phones that also do not have an external/removable batteries. If it was the charger then I will replace it myself, but the repair center has confirmed it is the battery and that it is not a liquid damage.<br> <br> Because it is out of 6 months I am not intending to rely on a warranty assessment, but the tablet has a 2 year warranty on the device of which MTN will repair any technical fault unless it is a physical damage.<br> <br> Please advise.