I'm used to getting about 1% an hour from my battery, drains a bit more when I use it heavily obviously. But suddenly a few days ago, literally it was fine one day and rubbish the next, it started draining very fast, a few % every 30mins. We've just got new fibre optic broadband, could it be it's taking more power to connect to that? I had a couple days off work last week and since I didn't go anywhere I left it plugged into the charger, and it was when I unplugged it I noticed the fast drain. Could that have damaged it somehow? Yesterday after unplugging it for work and the battery was still draining fast, I decided to let it completely drain out and then charge it back up while it was off and see what happened. It's been unplugged for 32mins and already on 96% which is not what I'm used to.