Hey, I have a Samsung Galaxy S3 and a few days ago it had 7% battery life so I plugged it in charge then a second later an info box came up saying 'battery disconnected'. What does this mean? Can I fix it? I've tried disconnecting and connecting the charger but the same message comes up, also turning it off and on, leaving the battery out for a day and putting it back in then putting the charger in, the small battery charging sign comes up for a moment, then a yellow triangle with a ! mark comes up next to it and it switches off, help!