Hello, I have issues with my battery- The power runs out really quickly. It's like everytime I use the buttons, even for a few clicks, I'm losing more and more power. Also, the battery icon in the "Now Playing" screen doesn't match the one in the main screen, it's going more down than the main icon battery. I'm using a microsd card, and I know it consumes power, but this is ridiculous. I tried tips for optimising battery runtime like the backlight, but it's not working. What should I do?.