I have a family members phone here. Phone shows red battery icon only This started 2 days ago, phone shows 100%, then shuts off. Plug it in, comes right back and its fine. Yesterday same thing Today, it turned off, never turned on again. Plugging in it doesn't help, computer doesn't recognize it. Took it to Apple, they ran diagnostics which shows no errors, and phone is fully working. Want 299 for replacement. The genius says he has no idea why its not turning on. No water damage. Tried the blow dryer trick by blowing hot air on the battery for a minute but no dice. Any tips you guys know ? We want to erase it now.