iPhone 4 will not stay with full battery unless plugged in

[Natas935]

I replaced the screen on iPhone 4 and everything works great on it. When plugged in it shows that it is charging and works great. But once it is unplugged it shuts off after 5-10 minutes with full battery life. I did indeed lose the contact clip that goes on the battery. Could that be my problem? Someone please help, I do not want to have to buy a new phone

 

[miles01110]

I did indeed lose the contact clip that goes on the battery. Could that be my problem?

Yes, losing a part can certainly affect how your phone behaves.