Whenever I turn on the laptop, after a few minutes, the battery starts draining. When I turn it off, it's unplugged, yet, the next time I turn it on, the battery is magically back at 100%, then it once more stars draining after a few minutes. I took my laptop for service twice to solve this. The first time, they replaced the motherboard, but the problem reappeared after a while. The second time (today), they replaced the battery. And yet, once more, it's draining while plugged in. Has this ever happened to anyone?