Poor quality

<p>I have a Samsung galaxy note 4, since day one Ive had endless problems with the battery. It charges fully, but as soon as the battery reaches 52% it simply reboots and when it comes back on the indicator shows 17%.Ive gone back to the store and they refuse to replace the battery as they say Ive charged it wrong. Ive bought a new Samsung battery, followed all the instructions as per the manual and store staff and yet the problem still continues, now when i plug the charger in, it starts draining the battery! What is going on! Is this also just a scheme to make money out of battery sales!? Might as well buy a HUAWEI phone as it looks excactly the same as my phone with way Less issues for a quarter of the price! </p>