Samsung Galaxy S2 White ?

Hello I have a Samsung Galaxy S2 White . Phone was fully working and it said battery low plugg in charge over night woke up and its dead will not power up ? ( HOWEVER SOMETIMES WHEN PLUGG IN CHARGE THE BATTERY ICON COMES UP SAYING CHARGING ) I am no mobile phone wiz so i have no idea or time repair . I have already replaced this with new phone i needed ASAP going cheap its boxed no scrathes on th screen or back just small scuff on top coner and up and down buttons are missing ( IT HAS NOT BEEN OPENED OR TOOK APART ) Ideal for cheap fix or screen or parts also covered under warranty so samsung may fix for free , on eBay there still good money for spares so no stupid offers please ! 07827314380 Scunthorpe!