I recently got the Verizon update for my Galaxy S4. I noticed a significant plummet in the battery's performance. Before the update, I could probably get somewhere around two days of normal usage. Now with the update, I can't even get a day without using it, when it just sits in my pocket at school. The phone will get hot sometimes and the battery life is bad. I have my phone fully charged before school around 7AM and barely using it all day until 2PM, before the update it would normally be somewhere in the 80s percent-wise, because some rooms don't have service and I leave my phone on all day. Now after updating, it went all the way down to 30 something percent, just being on standby. Right now, the biggest battery usage things are my screen at 36%, then followed by android core apps at 31%. I don't remember seeing that on my battery list thing before at all. Yesterday, it said cell standby was like 46% of it's usage, which is ridiculous. I don't and never have had things like Bluetooth, those smart things and GPS turned on and I always have WiFi off when I leave my house. I highly doubt that this is the battery it self's problem. Is anybody else experiencing this problem? Anyone know of any fixes or anything for this? I love my Galaxy mainly because of the great battery life, but now it just sucks that I can't even get a day out of it idling!