For some reason, last night the phone started to lose juice much faster than usual. I'm talking 50% within an hour or two. And it's pretty wonky in general in terms of power. I plug it into my car charger, and at first it wasn't charging. I had to reboot the phone to get it to recognize the charger. Also, I left it charging overnight, and this morning, it was at 93% instead of 100%. Weird... Is this a common issue? And why did it happen all of a sudden when it was fine before? Anything I can do?