Hi - I'm looking for some assistance on what all would suggest. I have a iPhone 5S running the latest version of iOS. I've been experiencing very quick discharge of the battery. It no longer can make it through the day or also is completely dead when I wake up in the morning. I always charge it to 100% before bed. We've tried different Apple chargers with no change in behavior. I've also restored the phone from a fresh copy of iOS (not a backup) with only the default apps, but the battery behavior is still the same. I've also noticed the back gets extremely warm to the touch. I took it to Apple today and ran the diagnostics. They didn't find anything that exceeded their limits, but the battery usage graph they showed to indicate very quickly discharges. 1% every 2-3 minutes. Does anything think just paying the $79 to replace the battery would help? Thanks.