On my Samsung Galaxy Tab Pro 8.4 when i go on the internet or playing a game like Temple Run 2, Gangster Vegas, Flick Shoot 2 lots more and it only happens from when i have around 30-35% charge left and downwards for some bizzare reason the battery always drops a lot of charge sometimes it goes from lets say 34% to 18% or from 17% to 8% nearly every time even with the power saving mode being on and it usually happens when i have been leaving the Tab Pro 8.4 on standby for over a day and it is very very annoying and i have never had this problem before. And it never happens the battery dropping charge a lot when i watch videos and when i just leave the Tab Pro 8.4 on standby the battery drains normally!! So i was just wondering Why is the battery dropping a lot of charge??? is the Battery failling and how to fix it?? Or is it because that i have done a factory reset lots of the times so is that why the battery is failing or not working probably/dropping charge a lot?? How to stop the battery dropping a lot of charge?? Has anyone had this problem before?? I really really need some help on this!!! By the way i have been using the Samsung Galaxy Tab Pro 8.4 for nearly 2 years now!!