iphone 5 wont turn on/ charge/ sync
a few weeks ago forgot to charge phone woke up dead stuck it on charge at work took 2hrs to come back on then it was fine then last week i done the same thing forgot to charge it died now wont turn on or anything Ive tried soft restart different chargers but nothing even left it on charge over night but still life less
its out of the 1year warranty
so battery and charger port changed worked fine charged then i let it die again and now same thing wont charge or turn on has anyone got any ideas?
been told it could be ic u2 but i don't know
iPhone 5, iOS 7.1.2