HELP iPhone battery replacement problem

my iphone 3gs crashing , black lines on screen. kept repeating , go worce bout new battery , said charging when batterys dead. left on charger 2 hours , showed same thing don't know do. help!!!

 

ngorkes said: ↑

my iphone 3gs crashing , black lines on screen. kept repeating , go worce bout new battery , said charging when batterys dead. left on charger 2 hours , showed same thing don't know do. help!!!

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i'm not understanding @ all. please try again.

 

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