IPhone 4 charging for days but won't turn on, any

I have an iPhone 4 (not 4s) that i bought about 6 months ago. Lately it has been turning off when it has full power or even while still in the charger. I put it in the charger and it can take days to turn back on. While in the charger it shows the empty battery and charging sign. When it does turn back on it lasts for a day or a half before needing charging again. I have tried resetting it but that did nothing to help. This is causing a lot of problems and any help would be appreciated.

The battery is dead so can't retain the charge
NEW BATTERY

It maybe its not about your phone. Its your battery. But if you bought new battery and its still continous… Well that is called boot loop… That is an eror of your hardware or you have been install creep apps… Youtube will help you… Just search some vidoes involving iphone 4 bootloop somethimg about that. Then watch and learn

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